WAGO 750-655 Bedienungsanleitung

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 1

Using the WAGO 750-655 AS-i Module with the SMLC

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 2

Introduction

The AS-interface master module 750-655 is

used to integrate the AS-interface network into

the WAGO-I/O-SYSTEM 750.

The AS-interface master module 750-655

behaves as a master for the AS-interface and as

a slave for the field bus. It complies with the

new AS-interface specification 2.1. This means

that:

• up to 62 AS-interface slaves can be connected

to the master

• the transmission of analog values is integrated

within the masters

• all other functions of the new specification,

such as the evaluation of peripheral errors, are

also implemented

The SMLC’s PLC Configuration supports using

the 750-655 with any of the 750 Series Ethernet

bus couplers.

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 3

From the WAGO manual

for the 750-655.

Up to three 750-655

modules can be

connected to one bus

coupler.

IMPORTANT: You

must have SMLC

firmware version 2.4.2

or later to use the 750-

655 module!

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 4

The 750-655 can be

configured in several

different operating modes.

In each of these modes

various process image

sizes can be selected,

allowing access to

increasing numbers of

AS-i slaves.

The SMLC requires that

the 750-655 be configured

in operating Mode 1 -

permanently configured

mailbox.

The SMLC requires the use of Mode 1

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 5

While the 750-655 can be configured for

many different process image sizes the

SMLC supports a limited number of these.

In the SMLC’s PLC Configuration you can

select from the following Mode 1 possible

configurations:

24 byte process image, 6 byte mailbox

12 byte process image, 6 byte mailbox

12 byte process image, 0 byte mailbox

40 byte process image, 0 byte mailbox

48 byte process image, 12 byte mailbox

The 0 byte mailbox configurations only

support digital slaves. If you intend to use

analog slaves you need to select a

configuration with a non-zero length

mailbox.

The table at the right shows all of the

possible Mode 1 configurations. The SMLC

only supports those listed above!

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 6

In order to decide which configuration you should insert into the SMLC’s PLC Configuration consider how many

slave devices you intend to use and whether they are all digital or if you will have some analog devices.

If you are going to use analog device you must use one of the configuration that supports the mailbox.

If you are going to use all digital devices you can pick one of the configurations with a 0 byte mailbox. The

advantage of the 0 byte mailbox is that the AS-i module will take up less memory in the bus coupler’s process

image, allowing you to install more I/O modules. Remember that the bus coupler is limited to 255 bytes of

inputs and 255 bytes of outputs and a maximum of 64 modules.

For example: if you know that you will have less then 20 digital AS-i devices and no analog devices then

selecting the 12 byte process image with a 0 byte mailbox is sufficient.

The table below shows how many slave devices can be supported for a given configuration. 7A indicates 7 slaves

on the A bus. 31A/31B indicates 31 slaves on the A bus and 31 slaves on the B bus, etc.

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 7

In order to configure the 750-655 AS-i module and to assign the slave device IDs you need to use

the WAGO I/O Check software (759-302). Connect the WAGO programming cable (750-920) to the

bus coupler and to a free serial port on your computer.

NOTE: If the Ethernet cable is plugged into the bus coupler, unplug it. WAGO I/O Check will not allow

you to configure the bus coupler while the fieldbus is active!

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 8

Start WAGO-I/O-Check configure the I/O Check COM port using the Settings menu.

In this example the cable is connected to COM2.

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 9

Start WAGO-I/O-Check and click on the Node Configuration icon to read the current configuration. In

this example we only have the 750-655 AS-i module and a 750-600 end module connected to a 750-342.

9/13/2007 Using the WAGO 750-655 AS-i Module with the SMLC 10

Click on the Settings button to configure the process image and mailbox size. The default settings are

24 byte process image and 6 byte fixed mailbox. The SMLC supports this configuration and this selection

allows you to access up to 31 AS-i slaves.

The SMLC does not support the Overlapped Mailbox so do not check this.

If you change any of the settings click the Apply button to send the new configuration to the bus coupler.

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