Key Input Related Problems; Normal Display Mode Problems - Honeywell DCP551 Mark ΙΙ User Manual

10-2 Key Input Related Problems

Procedures to correct key input related problems are described below.

Normal display mode problems

Mode cannot be changed using keys
Cause
Normal display mode not on
Program number does not start flashing when PROG key is pressed
Cause
Program selection of external switch input is not 0. Turn off all external switch inputs SW9 to 16.
Not set to READY mode.
Set to constant value control mode.
Set to key lock.
RUN mode cannot be invoked with the RUN/HOLD key
Cause
Program selected in READY mode is unset.
Set to END mode.
Set to key lock.
HOLD mode cannot be invoked with the RUN/HOLD key
Cause
Set to READY or FAST mode.
Set to END mode.
Set to constant value control mode.
Set to key lock.
RESET cannot be performed with the PROG, RUN and HOLD keys.
Cause
Set to READY mode.
Set to key lock.
Press DISP key to invoke normal display mode.
Set READY mode to execute RESET operation (
Set constant value control data
Set variable parameter
Select the set program.
Set READY mode to execute RESET operation (
RUN/HOLD keys
Set variable parameter
The HOLD mode is available from READY and FAST modes by
pressing the
Perform a reset operation (press the
keys
(press the
Set constant value control data
Set variable parameter
RESET is available in the READY program run mode and returns operations to the first
segment.
Perform a RUN operation (press the
the RUN mode. (A reset operation can also be performed in
the READY mode using external switch inputs or transmission.
Set variable parameter
Chapter 10. TROUBLESHOOTING
Measure
Measure
between 0 to 2.
PA01
Measure
).
between 0 to 2.
PA01
Measure
RUN key
. Press the
). Invoke the READY mode and perform a RUN operation
RUN/HOLD key
) to go to the RUN mode.
between 0 to 2.
PA01
Measure
between 0 to 2.
PA01
PROG + RUN/HOLD keys
setting to 0.
ConSt
PROG +
RUN/HOLD key
once again.
PROG RUN HOLD
, and
to 0.
ConSt
RUN/HOLD key
) to go to
).
10-3