Table of contents
Rockwell Automation Publication 1756-PM020F-EN-P - January 2019 7
Chapter 4
Unconnected Messaging (UCMM) through PCCC ...................................... 75
Connected Explicit Messages through PCCC............................................... 76
Fragmentation Protocol................................................................................. 78
Chapter 5
Supported Subset of PCCC Commands ........................................................ 81
Initial Fields of All PCCC Commands ......................................................... 82
PLC-2 Communication Commands .............................................................. 83
Unprotected Read (CMD=01, 41; FNC not present) ............................. 83
Protected Write (CMD=00, 40; FNC not present) ................................. 84
Unprotected Write (CMD=08, 48; FNC not present) ............................. 84
Protected Bit Write (CMD=02, 42; FNC not present) ........................... 84
Unprotected Bit Write (CMD=05, 45; FNC not present) ....................... 85
PLC-5 Communication Commands .............................................................. 85
Addressing examples.............................................................................. 86
Read Modify Write N (CMD=0F, 4F; FNC=79) ................................... 87
Typed Read (CMD=0F, 4F; FNC=68) ................................................... 88
Typed Write (CMD=0F, 4F; FNC=67) .................................................. 88
Word Range Read (CMD=0F, 4F; FNC=01) ......................................... 88
Word Range Write (CMD=0F, 4F; FNC=00) ........................................ 89
Bit Write (CMD=0F, 4F; FNC=02) ....................................................... 89
SLC Communication Commands ................................................................. 90
SLC Protected Typed Logical Read with 3 Address Fields (CMD=0F,
4F; FNC=A2) ......................................................................................... 90
SLC Protected Typed Logical Write with 3 Address Fields(CMD=0F,
4F, FNC=AA) ........................................................................................ 91
SLC Protected Typed Logical Read with 2 Address Fields (CMD=0F,
4F; FNC=A1) ......................................................................................... 91
SLC Protected Typed Logical Write with 2 Address Fields (CMD=0F,
4F; FNC=A9) ......................................................................................... 92
CIP Over the Controller Serial
Port