Mitsubishi MELSEC-F FX3U Series User Manual

E-18
4 Programming
4.6 Error Status
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX 3U -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
4.6 Error Status
If an error is detected on PT-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 PT-ADP hardware error (b6) or PT-ADP communication data error (b7) is detected, it is necessary to clear
the error status in a program at the 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 PT-ADP hardware error
b2
The temperature measurement data
in channel 3 is outside the specified
range, or disconnection is detected.
b7 PT-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

Mitsubishi MELSEC-F FX3U Series Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U Series
Category	Controller
Language	English