GE RX3i - Effect of PLC Modes and Actions on EGD Operations

Chapter 5. Ethernet Global Data
88 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q
The Ethernet Interface will continue supplying time values to the PLC CPU for time-stamping, while it "listens"
for SNTP timing messages from the network. If SNTP messages are received later, the Ethernet Interface will
then synchronize to them.
5.6 Effect of PLC Modes and Actions on EGD Operations
The configuration and operation of Ethernet Global Data may be affected by the PLC’s current mode and by
certain PLC actions:
▪ The normal PLC mode for EGD operation is RUN with Outputs enabled. In this PLC mode, Ethernet Global
Data remains configured and exchanges are both produced and consumed.
▪ If the PLC mode is set to STOP with I/O disabled, the Producer ID remains configured, but production and
consumption stop. Note that while consumed data is not transferred to the PLC memory in this mode, data
from the network is still transferred to the shared memory so that the latest data is available immediately
when the PLC transitions out of STOP with I/O disabled mode.
▪ If configuration is lost, the Ethernet Global Data configuration must be stored again.
PLC Mode or Action
Producer ID
remains
configured
Configuration-Based Exchanges
continue to be
Configured Produced Consumed
PLC Mode
RUN-Outputs Enabled YES YES YES YES
RUN-Outputs Disabled YES YES NO YES
RUN-SUSPEND I/O
8
YES YES YES YES
STOP-I/O Enabled YES YES YES YES
STOP-I/O Disabled YES YES NO NO
PLC Action
RUN-Store Logic YES YES YES YES
STOP-Store Logic YES YES
9 9
STOP-Clear Logic YES YES
9 9
STOP-Config Store Replaced
10
Replaced
8
NO
10
NO
10
STOP-Clear Config NO NO NO NO
PLC Power Cycle YES YES
9,11 9,11
Ethernet Interface Restart YES YES
9,11 9,11
8
RUN-SUSPEND I/O refers to the SUSIO logic function. (The DOIO logic function does not affect EGD production
or consumption.)
9
Production and consumption is controlled by the PLC Mode as described above.
10
Producer ID and exchange definitions are replaced.
11
Producer ID and exchange states depend on the PLC mode and configuration prior to the action.