Mitsubishi Electric MELSEC-FX3S Series Manual page 432

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -4AD-PTW-ADP (4-channel Platinum Resistance Thermometer Data Input)
3U
5.4 Program Check
Check the following items for the program:
1. Cancellation of error status at power-on
When the power is turned off and then on again, the error status should be cleared (b6 and b7 should turn off)
using the program.
2. Check of storage devices
Verify that different values are not being stored in the same device by the other parts of the programs.
5.5 Error Status Check
If an error occurs in the PTW-ADP, the corresponding bit will turn on.
The bit which is turned ON due to the error status is held ON until overwritten to OFF by the program or the
power is cycled. If b6 or b7 is turned ON, then it is necessary to clear the error status using the program the
next time the power of the PLC is cycled.
Bit
b0
b1
b2
b3
b4
To solve a problem, refer to the troubleshooting method described below:
1. Temperature measurement out of specified range or disconnection of line (b0 to b3)
1) Description of error
The input temperature measurement value is outside the specified range.
The temperature measurement value is not in the range between -115 °C to 615 °C.
Or the line between PTW-ADP and the platinum resistance thermometer sensor is disconnected.
2) Remedy
Check that the input temperature measurement value is within the specified range. Also check the wiring
condition.
2. EEPROM error (b4)
1) Description of error
The adjustment data set in the EEPROM before delivery from our factory cannot be read out properly or
is destroyed.
2) Remedy
Please contact your local Mitsubishi Electric representative.
3. Averaging time setting error (b5)
1) Description of error
The averaging time set for one of the channels (channels 1 to 4) is outside the specified
range: 1 to 4095.
2) Remedy
Check that the averaging time is correctly set for each channel.
J-28
PLC User's Manual - Analog Control Edition
3UC
Description
The temperature measurement data of
channel 1 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
channel 2 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
channel 3 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
channel 4 is outside the specified
range, or disconnection is detected.
EEPROM error
Bit
b5 Averaging time setting error
b6 PTW-ADP hardware error
b7 PTW-ADP communication data error
b8 to 15 Unused
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5 Troubleshooting
5.4 Program Check
Description
-