GE RX3i User Manual page 7

Contents
6.8 Write EGD Exchange (4003) .................................................................................................................... 104
Write EGD Exchange Command Block ..........................................................................................................104
6.9 Masked Write to EGD Exchange (4004) ................................................................................................ 106
Masked Write EGD Exchange Command Block ........................................................................................106
Chapter 7 Programming SRTP Channel Commands ............................................................................. 110
7.1 SRTP Channel Commands ...................................................................................................................... 110
Channel Operations .................................................................................................................................................111
Aborting and Re-tasking a Channel ................................................................................................................111
Monitoring the Channel Status ..........................................................................................................................111
SRTP Channel Commands in a Redundant System ................................................................................111
Executing a Channel Command .......................................................................................................................112
7.2 COMMREQ Format for Programming Channel Commands ............................................................. 113
The COMMREQ Command Block: General Description .........................................................................114
Establish Read Channel (2003) ..........................................................................................................................116
Establish Write Channel (2004) ..........................................................................................................................120
Send Information Report (2010) ........................................................................................................................123
Abort Channel (2001) ..............................................................................................................................................125
Retrieve Detailed Channel Status (2002) ......................................................................................................126
7.3 Programming for Channel Commands ................................................................................................ 127
COMMREQ Sample Logic ......................................................................................................................................128
Sequencing Communications Requests .......................................................................................................130
Managing Channels and TCP Connections .................................................................................................130
Use "Channel Re-Tasking" To Avoid Using Up TCP Connections .....................................................131
Client Channels TCP Resource Management ............................................................................................131
SRTP Application Timeouts ..................................................................................................................................132
7.4 Monitoring Channel Status .................................................................................................................... 132
Format of the COMMREQ Status Word .........................................................................................................132
Chapter 8 Modbus/TCP Server .................................................................................................................. 135
8.1 Modbus/TCP Server ................................................................................................................................. 135
Modbus/TCP Server Connections .....................................................................................................................135
Modbus Conformance Classes ..........................................................................................................................135
Server Protocol Services........................................................................................................................................135
Station Manager Support .....................................................................................................................................135
8.2 Reference Mapping .................................................................................................................................. 135
Modbus Reference Tables ....................................................................................................................................136
Address Configuration ...........................................................................................................................................137
vi PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q