Vega VEGAMET 624 Bedienungsanleitung

Supplementary instructions manual

Modbus-TCP,VEGA ASCII protocol

VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

C62

Signal conditioning instruments

and communication

in out

Contents

1Function as Modbus-TCP server

1.1Modbus-TCP -general description . . . . . . . . . . 3

1.2Filing of the measured value as 2byte short . . . 3

1.3Filing of measured value as 4Byte Float. . . . . . 6

2VEGA ASCII protocol

2.1Measured value enquiry via ASCII protocol . . . . 10

2.2Overview of the commands and options . . . . . . 11

2.3Version enquiry with command VERSION . . . . . 12

2.4Help with command HELP . . . . . . . . . . . . . . . . 12

2.5Delete the settings with the command

CLEARSTORE . . . . . . . . . . . . . . . . . . . . . . . . 13

2.6Measured value enquiry with command %. . . . 13

2.7Measured value enquiry with command &. . . . . 18

2.8Measured value enquiry with command?. . . . . . 24

2.9Measured value enquiry with command $. . . . . 29

2.10 Option TIME . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.11 Option REPEAT x. . . . . . . . . . . . . . . . . . . . . . 35

2.12 Option STORE . . . . . . . . . . . . . . . . . . . . . . . . 36

2.13 Option SUM . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

Contents

30768-EN-070730

1Function as Modbus-TCP server

1.1Modbus-TCP -general description

VEGAMET 624/625,VEGASCAN 693 and PLICSRADIO

C62 signal conditioning instruments work as Modbus-TCP

server and provide the existing PC/DCS value and relay

switching conditions in a temporary storage for collection via

Modbus-TCP.

The instruments stick to the "Open Modbus-TCP-Speciﬁca-

tion"Release 1.0of Schneider Electric.This standard is

supported by many process control systems,Remote IOs,

visualisation programs and OPC servers.Communication is

carried out via Port 502.

Apart from PC/DCS values there is the possibility to enquire

the switching conditions of the relay outputs.

The enquiry of the PC/DCS values and relay values is made

via the appropriate function code (see also Modbus speciﬁ-

cation).

lFunction code 01:Read Coil Status (enquiry of the relay

values)

lFunction code 02:Read Input Status (enquiry of the relay

values)

lFunction code 03:Read Holding Registers (enquiry of the

PC/DCS values)

lFunction code 04:Read Input Registers (enquiry of the PC/

DCS values)

These function codes are normally available as library

enquiries in the PLC (e.g.Modicon).

VEGAMET 624/625 and PLICSRADIO

C62 can provide up to

six PC/DCS outputs,VEGASCAN 693 up to 30.There are also

four relay values (one fail safe relay,three level relais,with

VEGASCAN one fail safe relay).

Via the selected PC/DCS output you deﬁne where the

respective measured value can be collected within the

temporary memory.The conﬁguration of the PC/DCS outputs

is carried out via PACTware™/DTM.

1.2Filing of the measured value as 2byte short

The adressing of the PC/DCS values for Modbus systems is

carried out "Word-orientated".In the temporary memory,aPC/

PC/DCS output

Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 3

Function as Modbus-TCP server

30768-EN-070730

DCS value is represented by two words.The ﬁrst word

contains the real PC/DCS value,the next higher word the

corresponding status information.In the speciﬁcation the term

The ﬁling of measured values in the temporary memory is

always sorted according to PC/DCS output number.The

following chart shows the addressing of the temporary memory

via Modbus.

Modicon

Temporary memory of VEGAMET/PLICSRA-

DIO (1word =2byte)

30001 PC/DCS output 1:Measured value

30002 PC/DCS output 1:Status

30003 PC/DCS output 2:Measured value

30004 PC/DCS output 2:Status

30005 PC/DCS output 3:Measured value

30006 PC/DCS output 3:Status

30007 PC/DCS output 4:Measured value

30008 PC/DCS output 4:Status

30009 PC/DCS output 5:Measured value

30010 PC/DCS output 5:Status

30011 PC/DCS output 6:Measured value

30012 PC/DCS output 6:Status

Modicon

Temporary memory of VEGASCAN (1word =

2byte)

30001 PC/DCS output 1:Measured value

30002 PC/DCS output 1:Status

30003 PC/DCS output 2:Measured value

30004 PC/DCS output 2:Status

30005 PC/DCS output 3:Measured value

30006 PC/DCS output 3:Status

30007 PC/DCS output 4:Measured value

30008 PC/DCS output 4:Status

30009 PC/DCS output 5:Measured value

30010 PC/DCS output 5:Status

30011 PC/DCS output 6:Measured value

4Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

Function as Modbus-TCP server

30768-EN-070730

Modicon

Temporary memory of VEGASCAN (1word =

2byte)

30012 PC/DCS output 6:Status

… …

30057 PC/DCS output 29:Measured value

30058 PC/DCS output 29:Status

30059 PC/DCS output 30:Measured value

30060 PC/DCS output 30:Status

Aa an alternative,register address 40001 is also available as

start address (function code 03).

The actual measured values are transmitted as signed data

comprising two octets.This means that the value range

encompasses max.+32768 to -32767.In addition to the

measured value,the status of the measured value is delivered

in a second register word.

Example of the data of a PC/DCS output

Measured value Status

High-Byte/Low-Byte High-Byte/Low-Byte

The status describes the condition of the associated measured

value.The content of the measured value is only valid if the

corresponding status has the value zero.If there is a status

value unequal zero,the status value and the corresponding

value in the measured value ﬁeld must be taken into account in

a detailed failure diagnosis.The following chart explains the

possible faults.

Status Measured val-

Meaning

0x00 0xXXXX Valid measured value

0xXX 0x8000 An error number is transmitted in the status

corresponding to the error codes Exx (e.g.29 =

E29 =Simulation).

0xXX 0x00XX An error number is transmitted in the status and

in the measured value which corresponds to the

error codes Exx.Must be conﬁgured via DTM.

Format of the PC/DCS value

Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 5

Function as Modbus-TCP server

30768-EN-070730

Note:

When transmitting the PC/DCS value in Modbus-TCP protocol

(measured value ﬁling as 2byte short), the decimal point is not

transmitted,the value -0,5bar is transmitted as -50.If the data

format was selected in such a way that values outside the

value range can be caused,limitation to the highest value of

the value range is made.

Example:Percent was selected as "Reference value "and #.

### as "Data format ".With this setting,the value 100 %should

be transmitted as 100000 which is outside the valid range of

max.+32767.This means that a limit will be imposed and

32767 transmitted instead.To avoid this,"Data format "#.##

should be chosen so that the value 100 %is transmitted as

10000.

Note:

With the switching inputs of PLICSRADIO

C62 (measure-

ment loops 4…6)the value 0(switch open)and 100 (switch

closed)are transmitted as measured values,the units are

deleted.

The switching conditions of the relay are transferred as bit

information.

The following equivalencies apply to the switching relays:

l0=Switching status Oﬀ

l1=Switching status On

The following equivalencies apply to the fail safe relay:

l0=Failure message Oﬀ,relay switching condition On

l1=Failure message Oﬀ,relay switching condition Oﬀ

The following chart shows the addressing of the temporary

memory via Modbus.

Modicon

Temporary memory of VEGAMET/PLICSRA-

DIO (1bit)

10001 Fail safe relay

10002 Relay 1

10003 Relay 2

10004 Relay 3

1.3Filing of measured value as 4Byte Float

The ﬁling of measured values in the temporary memory is

Filing of the relay values

6Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

Function as Modbus-TCP server

30768-EN-070730

always sorted according to PC/DCS output number.The

following chart shows the addressing of the temporary memory

via Modbus.The values are accessed via FC 3and 4.The

status information is also transmitted as ﬂoat value.8byte are

needed for one output,corresponding to 4registers.

Information:

Note:Aﬂoat value comprises 2registers,i.e.a total of 4bytes!

Modicon

Temporary memory of VEGAMET/PLICSRA-

DIO (2words =4byte)

31001 PC/DCS output 1:Measured value

31003 PC/DCS output 1:Status

31005 PC/DCS output 2:Measured value

31007 PC/DCS output 2:Status

31009 PC/DCS output 3:Measured value

31011 PC/DCS output 3:Status

31013 PC/DCS output 4:Measured value

31015 PC/DCS output 4:Status

31017 PC/DCS output 5:Measured value

31019 PC/DCS output 5:Status

31021 PC/DCS output 6:Measured value

31023 PC/DCS output 6:Status

Modicon

Temporary memory of VEGASCAN (2words =

4byte)

31001 PC/DCS output 1:Measured value

31003 PC/DCS output 1:Status

31005 PC/DCS output 2:Measured value

31007 PC/DCS output 2:Status

31009 PC/DCS output 3:Measured value

31011 PC/DCS output 3:Status

31013 PC/DCS output 4:Measured value

31015 PC/DCS output 4:Status

31017 PC/DCS output 5:Measured value

31019 PC/DCS output 5:Status

31021 PC/DCS output 6:Measured value

Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 7

Function as Modbus-TCP server

30768-EN-070730

Modicon

Temporary memory of VEGASCAN (2words =

4byte)

31023 PC/DCS output 6:Status

… …

31113 PC/DCS output 29:Measured value

31115 PC/DCS output 29:Status

31117 PC/DCS output 30:Measured value

31119 PC/DCS output 30:Status

As an alternative,register address 41001 is also available as

start address (function code 03).

The actual measured values are transmitted as signed data

comprising four octets.In addition to the measured value,the

status of the measured value is supplied in a second register

word.

Example of the data of a PC/DCS output

Float Bit 15…0Float Bit 31…16

High-Byte/Low-Byte High-Byte/Low-Byte

Note:

With the switching inputs of PLICSRADIO

C62 (measure-

ment loops 4…6)the value 0(switch open)and 100 (switch

closed)are transmitted as measured values,the units are

deleted.

984 Floating point:Intel single precision real.First register

contains bits 15 …0of 32 bit number (bits 15 …0of

signiﬁcand). Second register contains bits 31 …16 of 32 bit

number (exponent and bits 23 …16 of signiﬁcand).

The status describes the condition of the associated measured

value.The content of the measured value is only valid if the

corresponding status has the value zero.If there is a status

value unequal zero,the status value and the corresponding

value in the measured value ﬁeld must be taken into account in

a detailed failure diagnosis.The following chart explains the

possible faults.

Format of the PC/DCS value

Floating point of OPEN MOD-

BUS/TCP SPECIFICATION

8Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

Function as Modbus-TCP server

30768-EN-070730

Status Measured val-

Meaning

0XXXX Valid measured value

<> 0 0 An error number is transmitted in the status

corresponding to the error codes Exx (e.g.29 =

E29 =Simulation).

<> 0XX0XX An error number is transmitted in the status and

in the measured value which corresponds to the

error codes Exx.Must be conﬁgured via DTM.

The switching conditions of the relay are transferred as bit

information.

The following equivalencies apply to the switching relays:

l0=Switching status Oﬀ

l1=Switching status On

The following equivalencies apply to the fail safe relay:

l0=Failure message Oﬀ,relay switching condition On

l1=Failure message Oﬀ,relay switching condition Oﬀ

The following chart shows the addressing of the temporary

memory via Modbus.

Modicon

Temporary memory of VEGAMET/PLICSRA-

DIO (1bit)

10001 Fail safe relay

10002 Relay 1

10003 Relay 2

10004 Relay 3

As an alternative,register address 00001 is also available as

start address.

Filing of the relay values

Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 9

Function as Modbus-TCP server

30768-EN-070730

2VEGA ASCII protocol

2.1Measured value enquiry via ASCII protocol

With the VEGA ASCII protocol you have the ability to enquire

PC/DCS values via the Ethernet or RS232 interface.By using

ASCII characters,a measured value enquiry is possible with

easy terminal programs such as HyperTerminal.

The PC/DCS values are retrieved by special commands.It is

possible to get the measured value in diﬀerent resolutions,

with/without unit or with current date/time.

The activation of the VEGA ASCII protocol is carried out by

means of the instrument DTM under "Device settings -RS232

interface".For the VEGA ASCII protocol the following interface

parameters are set per default:

lCoding system:8Bits,ASCII

lBaud rate:9600 Bits/sec

lData bits:8

lParity:none

lStop bits:1

For direct connection between signal conditioning instrument

and PC or DCS,the RS232 modem connection cable and an

additionally connected interlink cable from the scope of

delivery will be required.If connection is provided via modem,

only the attached RS232 modem connection cable is used.

You will ﬁnd further information in chapter "Connection".

The VEGA ASCII protocol is handled via the TCP/IP -Port 503.

When using the terminal program HyperTerminal,the following

settings are required:

lIP addr.of the signal conditioning instrument:

192.168.200.200 (default setting)

lTCP/IP Port:503

lConnection:TCP/IP

Access via RS232

Access via Ethernet

10 Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO

VEGA ASCII protocol

30768-EN-070730

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