December 2001 Data Transfer by PLC 8 – 31
Example: Transferring a binary block
When transferring binary data starting from the address B126, the ASCII
characters <F> <A> <8> <1> etc. are transmitted in sequence from the word
memory through the interface. Each byte contains two ASCII characters. The
transmit and receive buffers each hold 63 bytes.
Module 9100 Assign data interface
Module 9100 assigns an interface to the PLC and configures the transfer
parameters. It initializes the interface, thereby erasing any errors that may
have occurred. The interface is switched to receive mode.
Once assigned to the PLC, the interface is disabled for use by the input/output
program of the user interface. The assignment is canceled when the PLC
program is recompiled.
Can only be called in a submit job or spawn job!
Call:
PS B/W/D/K <Interface>
0: RS232
1: RS422
PS B/W/D/K <Transfer parameters>
0: from MP50x0.2
1: from MOD function
CM 9100
Error recognition:
Address Value ASCII character
...
B126 11111010 $FA
. 10000001 $81
..
..
..
Marker Value Meaning
M4203 0 Interface was assigned
1 Error code in W1022
W1022 1 Incorrect interface or incorrect transfer parameter
13 No connection
14 Interface already assigned or input/output not ready
17 Incorrect data transfer rate
20 Module was not called in a spawn job or submit job
To Next Page
Loading...
