Siemens SIMATIC TIWAY 1 User Manual download pdf (Page 80)

Programming

Examples

C-4

C.2 Example #1: Dual Communication Channels

This

program performs two functions:

It verifies that the module is set up correctly by checking the network

address, V Memory starting address, and redundant media setting.

It verifies that each station which should be active on the network is

logged in on the active channel lists (status words 1 and 2). If the

correct bit is not set, indicating that the module being read is not active

on the network, then the data for that module will not be valid.

C.2.1

Network

This program is designed for 8 stations with network addresses 1,

Configuration

2, 3, 4, 5, 6, 7, and 8. Status words 1 and 2 should look the same as those

shown above if everything is operating correctly

For simplicity

, this program will run in the P/C at network address 2

(station 2), although you may want to modify this to run in every P/C on

your network. In addition, the following assumptions have been made in

this program:

The active monitor will be selected as network address 1.

Dual communication channels are connected to all modules.

Station 2 will be located in Base 0, slots 1 and 2, with its I/O address

starting at WX1.

The starting address of the V Memory table in station 2 will be V1.

C.2.2

Program

This program is designed to first load the value of the V Memory

Operation

starting address (V1) into WY4 and WY5. W

ith 8 active stations this will

allocate a block of 128 V Memory locations in station 2 (V1-V128).

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 106 107

No comments

Siemens SIMATIC TIWAY 1 User Manual Page 80