6. REMOTE INPUT/OUTPUT AND REMOTE REGISTERS
IMSRM52-E4
50
Heater break alarm function
The current transformer (CT) input measured value [Extension No.2] and heater break alarm set value
[Extension No.24] are used by the heater break alarm function. The heater break alarm set value is set
to about 85% of the current transformer (CT) input measured value. However, for a heater having a
slightly delayed current rise characteristic, change the set value by lowering the set value if necessary.
Heater break alarm function:
The presence or absence of heater break is determined by comparing the current flowing through the
heater (current transformer input measured value: Extension No. 2) to the current preset and assumed
to be abnormal (heater break alarm set value: Extension No. 24). The presence or absence of heater
break can be recognized by the ON/OFF condition of the heater break alarm (remote input).
The heater break alarm function in this instrument cannot be used with continuous analog
output.
Break detection:
If the current transformer input measured value read from the CT is smaller than the preset heater
break alarm set value even with the control output produced, the heater break alarm is turned on.
Welding detection:
If the current transformer input measured value read from the CT is larger than the preset heater break
alarm set value even with the control output produced, the heater break alarm is turned on.
Data of error code
The error code [Extension No. 32] bit pattern becomes as follows.
“1: Backup data check error”, “2: RAM read/write error” or “4: Internal communication
error” may not be recognized by the H-LNK-A module if the H-PCP module cannot
recognize the H-LNK-A module.
If a hardware error (SR Mini HG error code) occurs, the remote input hardware error flag
[RXnF] is turned on.
CAUTION
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Hardware error No.(Decimal digits)
(SR Mini HG code error)
0 : Normal
1 : Backup data check error
2 : RAM read/write error
3 : System configuration error
4 : Internal communication error
5 : A/D converter error
6 : Adjustment data error
Set data range check error
0: Normal
1: Abnormal
Read-only data write error
0: Normal
1: Abnormal
CT
(Current transformer)
Heater
CT module
TIO module
Sensor
Control output
CT input
Operation
unit
