Forced-Zero - Omron K3GN - V1.04 User Manual

CHAPTER 6 FUNCTION DESCRIPTION

6.7 Forced-zero

Note
The forced-zero function is
not available when the input
type is set to "pulse". Key
entry for the forced-zero
operation is also ignored.
TIPS
The forced-zero function is
available via the event input
terminal only when the input
type is set to "analog" or
"remote" and terminal is
assigned the task of
"forced-zero execution".
92
This feature shifts a process value to zero, and can be used to evaluate and display
the deviation of a process value from a reference value.
The forced-zero function can be activated by using the
panel, via the event input terminal, or communications
The following illustrates the forced-zero and forced-zero cancel operation.
Process value
Forced-zero value
(shifted value)
ZERO input
When ZERO input turns on, the current process value is shifted to zero
forcedly.
Thereafter, measurements are made relative to the zero point.
When ZERO input turns on while the forced-zero function has been activated,
the current process value is further shifted to zero.
When ZERO input is on for one second, the forced-zero operation is canceled.
Because the forced-zero and forced-zero cancel operation using the
stored in EEPROM, the forced-zero state is alive even if the power is turned off
and on again.
In contrast, the forced-zero and forced-zero cancel operation via event input
terminal is not stored in EEPROM.
If the forced-zero operation is executed via the event input terminal after it is
activated by key entry, the forced-zero operation via the event input terminal takes
effect.
key entry
/
ZERO
Event input

Forced-zero

Forced-zero
executed executed
Forced-zero
executed
The minimum input time
for HOLD signal is 80ms.
1 sec.
1 sec.
Forced- Forced - zero
zero executed
canceled
Forced-zero Forced - Forced - zero
executed executed
z ero
canceled
The forced - zero cancel operation is
ignored if the forced - zero function
has already been deactivated.
key on the front
/
ZERO
Measurement value
after executing the
forced-zero function
key is
/
ZERO