8 Periodic Redundancy Tests
8.4 Redundant 8-Channel Analog Output IOPs
R688 HPM High-Performance Process Manager Service 461
December 2020 Honeywell
Select the <SYST STATS> (SYSTEM STATUS) key on the console and then select the
PROCESS NETWORK STATUS target on the display for the network that contains the
High-Performance Process Manager (HPM) or Process Manager (PM) of interest. The
UCN Status display is produced on the console screen.
Choose the status box containing the HPM of interest and then select the DETAIL
STATUS target on the UCN Status display. The HPM Detail Status display is produced
on the screen.
Select the RUN STATES target on the HPM Detail Status display. The SWAP
PRIMARY target along with other targets appear at the bottom of the display.
Select the SWAP PRIMARY target. This produces the ENTER and CANCEL targets to
the right of the SWAP PRIMARY target.
Note the status in the IOP status box on the display for the redundant pair of IOPs that
are of interest. The status box should contain an “OK/BKP” label. Choose the IOP
status box of interest. Then, select the ENTER target. The “OK/BKP” label in the IOP
status box should switch to “BKP/OK,” respectively after approximately 5 seconds,
indicating the IOP redundancy is functional.
The orientation of the redundant IOPs should be returned to their original positions by
selecting the ENTER target a second time.
Repeat step 5 for any other redundant pairs of IOPs.
8.4 Redundant 8-Channel Analog Output IOPs
Introduction
Redundancy for the 8-channel Analog Output IOPs is biased toward the IOP A to maximize reliability.
Hardware bias is preferred because IOP B (the physical secondary) is connected to the Analog Output
FTA through a switching module on the FTA, while IOP A (the physical primary) is connected directly
to the FTA circuitry that interfaces the FTA’s field wiring output terminals. Use of the procedure in this
subsection tests a redundant pair of Analog Output IOPs for proper operation.
Hardware identification
Locate the following components.
Analog Output IOP A
Analog Output IOP B
The redundant Analog Output FTA
An Analog Output Standby Manual device
Devices that are being controlled by the analog output of the FTA
Control algorithms that are driving the analog outputs
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