Effect Of Plc Modes And Actions On Egd Operations - GE RX3i User Manual

Chapter 5. Ethernet Global Data
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.

Effect of PLC Modes and Actions on EGD Operations

5.6
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
PLC Mode
RUN-Outputs Enabled
RUN-Outputs Disabled
RUN-SUSPEND I/O
8
STOP-I/O Enabled
STOP-I/O Disabled
PLC Action
RUN-Store Logic
STOP-Store Logic
STOP-Clear Logic
STOP-Config Store
STOP-Clear Config
PLC Power Cycle
Ethernet Interface Restart
RUN-SUSPEND I/O refers to the SUSIO logic function. (The DOIO logic function does not affect EGD production
8
or consumption.)
Production and consumption is controlled by the PLC Mode as described above.
9
Producer ID and exchange definitions are replaced.
10
Producer ID and exchange states depend on the PLC mode and configuration prior to the action.
11
88 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual
Producer ID
remains
configured
Configured
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
Replaced Replaced
10
NO NO
YES YES
YES YES
Configuration-Based Exchanges
continue to be
Produced
YES
NO
YES
YES
NO
YES
9
9
NO
8 10
NO
9,11
9,11
Consumed
YES
YES
YES
YES
NO
YES
9
9
NO
10
NO
9,11
9,11
GFK-2224Q