Honeywell HPM, Сервисная инструкция

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6 Removal and Replacement
6.5 AO Standby Manual Device Operation
R688 HPM High-Performance Process Manager Service 413
December 2020 Honeywell
With the
DIR/REV
switch in the
REV
position, 20 mA equals 0% and 4 mA equals 100%. The
INC
position of the INC/DEC switch will decrease current and the DEC position will increase current.
Standby Manual device control procedure
Use the HPM Status display to save the Checkpoint for the IOP, and then use the procedure in the
following table to provide Standby Manual device control of the FTA field devices.
Step Action
1
Be sure all the OUTPUT SOURCE SELECT switches are in the PM position.
2
Place the DIR/REV switches in the correct position for all eight channels.
3
Connect a standard IOP to FTA cable between the STANDBY MANUAL connector on
the FTA and the AOSM.
4
Verify that all OUTPUT SOURCE SELECT switches are in the PM position.
5
The BALANCE switch has three positions, left ( CONT ), center (inactive), and right
( PUSH TO BALANCE ). Select the left or right position.
CONT Position
In the CONT inuous (left) position, the switch remains toggled and all the channels with
their OUTPUT SOURCE SELECT switch in the PM position will automatically have
their Standby Manual device output level continuously set equal to the IOP level.
Manual
INC rement and DEC rement control for a channel is not possible when a
channel is in the PM position while the BALANCE switch is in the CONT position.
PM Position
In the PUSH TO BALANCE (right) position, the position is momentary and all channels
with their OUTPUT SOURCE SELECT switch in the PM position will automatically have
their Standby Manual device output level set equal to the IOP output level. However,
this balance method is a single event and the switch returns to the center position when
it is released. Any subsequent change in the IOP’s output level will not be transferred to
the Standby Manual, but the
INC rement and DEC rement control for a channel can alter
the Stand
by Manual device’s current level.
6
The STANDBY ENABLE switch can now be depressed. The green LED illuminates to
indicate that the FTA is now ready for control by the Standby Manual device.
7
Placing any or all of the OUTPUT SOURCE SELECT switches in the MAN ual position
will automatically place all eight IOP channels in the Standby Manual mode.
8
When all eight OUTPUT SOURCE SELECT switches are in their MAN ual position, the
Analog Output IOP can be placed in the Idle state and removed.