Rockwell Automation 1203 Serial Communications Module Series B - Manual (Page 36)

4–2 Configuring and Interfacing
1203–5.5 September 1995
Supported PCCC Command List
The Serial Communications Module supports the following PCCC
Commands:
CMD Code FNC Code Command Name PLC Addressing Method
01h n/a Unprotected read PLC–2 address
06h 00h Echo n/a
01h Read diagnostic counters Variable (modified PLC–2 addresses)
02h Set variables (#ENQs, #NAKs, TIMEOUT) n/a
03h Identify host and some status n/a
04h Set timeout n/a
05h Set #NAKs n/a
06h Set #ENQs n/a
07h Reset diagnostic counters n/a
09h Read link parameters Logical address
0Ah Set link parameters Logical address
08h n/a Unprotected write PLC–2 address
0Fh 67h Typed write System address (4 possibilities)
68h Typed read System address (4 possibilities)
A1h
Protected typed logical read with two
address fields
File number/type/element number
A2h
Protected typed logical read with three
address fields File number/type/element
number/sub–element number
A9h
Protected typed logical write with two
address fields
File number/type/element number
AAh
Protected typed logical write with three
address fields File number/type/element number/
sub–element number
ABh
Protected typed logical write with four
address fields File number/type/element number/
sub–element number/bit mask