Omron GRT1 - 11-2007 Operation Manual page 318

Troubleshooting by Unit
Model
Counter Units The counter value is
reset at unexpected
GRT1-CT1(-1)
times.
GRT1-CP1-L
The counter was preset
to an unexpected value.
The counter monitor
values do not match the
setting of the Register
Selection Bits.
The counter present
value is not stored as
the monitor value.
ON delay time, OFF
delay time, or Sensor
operation delay time
cannot be set.
The range cannot be
set using the Configura-
tor.
Counter Units, The status of the
phase-Z input and digi-
GRT1-CP1-L only
tal input does not
appear on the Z/I indi-
cator.
The status of the
phase-A input and
phase-B input does not
appear on the A,B indi-
cator.
Details
Resetting the counter with a digital input
has been enabled (only GRT1-CT1(-1)).
Resetting the counter with the phase-Z
input has been enabled (GRT1-CP1-L
only).
The counter is set to be reset at each
falling edge or rising edge of the digital
input.
The Reset Command Bit was turned
ON.
The counter is set to be preset at each
falling edge or rising edge of the digital
input.
The Preset Command Bit was turned
ON.
The Read Command Bit was not turned
ON after changing the setting of the
Register Selection Bits.
The monitor value has been set to auto-
matically show the present value of the
counter when the Unit is restarted or
reset.
Another value is stored as the monitor
value.
These functions are not supported by
the Counter Unit.
The range check box is not selected in
the Configurator.
An exclusive OR of the phase-Z input
and digital input is shown on the Z/I indi-
cator.
An exclusive OR of the phase-A input
and phase-B input is shown on the A,B
indicator.
Probable cause
Section 9-5
Remedy
Disable the digital input or set
the Digital Input Counter
Reset Mode Bits to 00.
Set Counter Reset Mode Bits
for the phase-Z input to 00.
Disable the digital input or
switch the digital input to
another operating mode.
Make sure the Reset Com-
mand Bit is not turned ON.
Disable the digital input or
switch the digital input to
another operating mode.
Make sure the Preset Com-
mand Bit is not turned ON.
Turn ON the Read Command
Bit.
Set the Register Selection
Bits and monitor value again.
Set the Register Selection
Bits to 000 and turn ON the
Read Command Bit again.
---
Select the range check box,
and then set the upper and
lower limits.
Turn OFF one of the inputs.
Turn OFF one of the inputs.
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