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5-3GFK-0787B Chapter 5 Diagnostics
Setting Up Blocks to Report Genius Faults
By default, most Genius blocks, including the types of blocks normally used in GMR
systems, send only one copy of a Fault Report. For a GMR system, blocks can be set up to
send additional Fault Reports. The setup needed for a block depends on two things: what
type of block it is, and how many PLCs should receive its Fault Reports..
Setting Up 16- and 32-Circuit DC Blocks to Send Multiple Fault Reports
A 16 or 32 Circuit DC Sink/Source block (only) will send three Fault Reports, one each to
serial bus addresses 29, 30, and 31, if set up in either of the following ways:
For blocks in a GMR group, block configuration is CPU Redundancy = GMR
For non-GMR group blocks, block configuration is CPU Redundancy= Hot Standby.
Hot Standby is selected on “Non-Voted I/O” screen of the GMR configuration software.
Setting Up Other Blocks to Send Multiple Fault Reports
Other blocks may also send “extra” copies of Fault Reports.
Inputs-only blocks automatically send two Fault Reports to serial busses 30 and 31
with no additional configuration.
Output and mixed I/O blocks configured for CPU Redundancy = Hot Standby will
send two Fault Reports to serial bus addresses 30 and 31.
If the block is configured in the GMR configuration, the GMR software issues an
“Assign Monitor” datagram to cause a block to send the third fault report.
Summary Table
The following table summarizes how many Fault Report messages are sent by blocks
configured for different types of CPU Redundancy, with or without the Assign Monitor
datagram. X means the feature is not configurable for that block. (Page 6-50 describes
configuring Genius blocks for Fault Reporting)
CPU Redundancy Mode Configuration
Block Type
GMR
none Hot Standby
Block Type
GMR
no Assign
Monitor
datagram
yes Assign
Monitor
datagram
no Assign
Monitor
datagram
yes Assign
Monitor
datagram
16 or 32 Ckt DC Sink/Src 3 1 2 2 3
8 Ckt AC Grouped I/O X 1 2 2 3
Relay Outputs NO/ NC X 1 2 2 3
16 Ckt AC Inputs X 2 3 X X
4 In, 2 Out Analog X 1 2 2 3
Crnt source Analog In X 2 3 X X
Crnt source Analog Out X 1 2 2 3
Thermocouple or RTD X 2 3 X X
High-speed Counter X 1 2 2 3
PowerTRAC X 1 2 2 3