F-19
4 Programming
4.7 Error Status
FX
3U
/FX
3UC
Series PLC User's Manual - Analog Control Edition
FX3U-4AD-TC-ADP (4-channel Thermocouple Data Input)
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction
(FNC 88)
4.7 Error Status
If an error is detected on TC-ADP, the error status data will be stored in the corresponding special data
register.
The following table shows the special data registers that store the error status data:
Check the ON/OFF status of each bit of the error status data register to determine the error. Errors are
assigned to the bits as shown in the following table. Create a program to detect errors.
1. Caution regarding use of error status data
If TC-ADP hardware error (b6) or TC-ADP communication data error (b7) is once detected, it is necessary to
clear the error status by a program at next power-on of the PLC.
For this reason, be sure to create the following program:
Special data register
Description
1st 2nd 3rd 4th
D8268 D8278 D8288 D8298 Stores the error status data.
Bit Description Bit Description
b0
The temperature measurement data
in channel 1 is outside the specified
range, or disconnection is detected.
b5
Number of averaging time setting
error
b1
The temperature measurement data
in channel 2 is outside the specified
range, or disconnection is detected.
b6 TC-ADP hardware error
b2
The temperature measurement data
in channel 3 is outside the specified
range, or disconnection is detected.
b7 TC-ADP communication data error
b3
The temperature measurement data
in channel 4 is outside the specified
range, or disconnection is detected.
b8 to b15 Unused
b4 EEPROM error - -
Error status of 1st analog special adapter
b6 = OFF (hardware error)
Error status of 1st analog special adapter
b7 = OFF (communication data error)
M8002
Initial pulse
RST D8268.6
RST D8268.7
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