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Attached Function
Sensor correction
Shifts the PV when the temperature at the controlling location does not
match with the temperature at the sensor location. (Effective within the
input rating range regardless of the sensor correction value.)
Correction range: Thermocouple, RTD input: -200.0 to 200.0
( )
DC voltage, current input: -2000 to 2000 (The placement of the decimal
point follows the selection.)
Set value lock
Locks all set values – except Set value lock – to prevent setting errors.
Auto/Manual control
switch
Auto/Manual control can be selected in [Auto/Manual control switch] in
Auto/Manual control switch group.
If control action is switched from automatic to manual and vice versa,
balanceless-bumpless function works to prevent a sudden change in MV.
When switched to manual control, the MAN and MV indicators light up,
the STEP Display indicates
, and the SV/MV/TIME Display indicates
the MV. To set the MV, use the
or
key.
When switched to automatic control, the SV/MV/TIME Display shows SV.
When power is turned ON, automatic control is performed.
MV setting range:
When control action is switched to Manual during Program control Stop
(in Standby):
[Output block 0 OUT1 low limit] to [Output block 0 OUT1 high limit]
If D
option is ordered:
– [Output block 0 OUT2 high limit] to [Output block 0 OUT1 high limit]
When control action is switched to Manual during program control:
[OUT1 low limit of running step output block number] to
[OUT1 high limit of running step output block number]
If D
option is ordered: – [OUT2 high limit of running step output block
number] to [OUT1 high limit of running step output block number]
Power failure countermeasure The setting data is backed up in the non-volatile IC memory.
Self-diagnosis
The CPU is monitored by a watchdog timer, and if an abnormal status
occurs, the controller is switched to warm-up status, turning all outputs
OFF.
Automatic cold junction
temperature
compensation
This detects the temperature at the connecting terminal between the
thermocouple and the instrument, and always maintains it at the same status
as if the reference junction location temperature were at 0
(32 ).
Burnout (Overscale)
If thermocouple or RTD input is burnt out, the PV display flashes
, and OUT1, OUT2 are turned OFF (OUT1 low limit value for
direct current output). For Manual control, the preset MV is output.
Input
error
Contents, Indication
Output Status
OUT1
OUT2
Direct
(Cooling) action
Reverse
(Heating) action
Direct
(Cooling) action
Reverse
(Heating) action
Overscale
If PV exceeded indication
range high limit:
flashes.
OFF (4 mA) or
OUT1 low limit
value
OFF (4 mA) or
OUT1 low
limit value
OFF or
OUT2 low
limit value
OFF or
OUT2 low
limit value
Underscale
If PV has dropped below
indication range low limit:
flashes.
OFF (4 mA) or
OUT1 low limit
value
OFF (4 mA) or
OUT1 low
limit value
OFF or
OUT2 low
limit value
OFF or
OUT2 low
limit value
For Manual control, the preset MV is output.
DC input disconnection: If DC voltage or current input is disconnected, the following is
indicated depending on the input.
4 to 20 mA DC, 1 to 5 V DC input: The PV Display flashes
.
0 to 10 mV DC, -10 to 10 mV DC, 0 to 50 mV DC, 0 to 100 mV DC, 0 to 1 V DC input:
The PV Display flashes
.
0 to 20 mA, 0 to 5 V DC, 0 to 10 V DC input:
The PV Display indicates the value corresponding with 0 mA DC or 0 V DC input.
