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8.1 Error Code List
The following section explains the types of errors that may occur when the A/D converter module is used, and how to troubleshoot such errors.
If an error occurs in the A/D converter module while writing to or reading data from the programmable controller CPU, the applicable error code is written to buffer memory address 19 (Un\G19).
Table 8.1 Error code list
Error code
(decimal)
Error description Processing
10
111
161
162
163
1
The input range is set an illegal value using the intelligent function module switch in GX Developer.
indicates the incorrectly specified channel number.
Reset to the correct parameter with GX Developer parameter setting. (See Section 4.5.)
Module error at startup.
The G(P).OGSTOR instruction was executed in the offset/gain setting mode.
• The G(P).OGSTOR instruction was executed consecutively.
• At the time of offset/gain setting, a set value was written to the E
2
PROM 26 or more times.
The G(P).OGSTOR instruction was executed for the model that differs from the model for which the
G(P).OGLOAD instruction had been executed.
Turn the power OFF and ON again. If the error occurs again, the module may be malfunctioning.
Contact the nearest distributor or branch office with the description of the problem.
Do not execute the G(P).OGSTOR instruction in the offset/gain setting mode.
• Execute the G(P).OGSTOR instruction only once for one module.
• At the time of offset/gain setting, write a set value only once at one time.
Execute the G(P).OGLOAD and G(P).OGSTOR instructions for the same model.
20
30
40
500
The average time setting value for buffer memory addresses 1 to 8 (Un\G1 to Un\G8) is outside the range of 2 to 5000 ms. indicates the incorrectly specified channel number.
The average number of times setting value for buffer memory addresses 1 to 8 (Un\G1 to Un\G8) is outside the range of 4 to 62500 times. indicates the incorrectly specified channel number.
The offset value is equal to or greater than the gain value at the time of user range setting or user range restoration.
indicates the error causing channel number.
The offset/gain channels were set at the same time during offset and gain value settings, or both were set to 0.
Reset the average time setting to a value within the range of 2 to 5000 ms.
Reset the average number of times setting value to within the range of 4 to 62500 times.
Reset so that the offset value becomes smaller than the gain value.
Reset the contents of buffer memory addresses 22 and 23 (Un\G22 and Un\G23).
1: Not written to the buffer memory address 19 (Un\G19). Written to the completion status area (S)+1 of the
G(P).OGSTOR instruction.
POINT
(1) If more than one error occurs, the error code first detected by the A/D converter module is stored. No other error codes will be stored.
(2) The error can be cleared by setting the error clear request (YF) to "ON".
(3) The error is cleared at the time of mode switching.
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8.2 Troubleshooting
8.2.1 When the "RUN" LED is flashing or turned off
(1) When flashing
Check item
Is the mode set to the offset/gain setting mode?
Corrective action
Reset switch 4 of the intelligent function module setting for
GX Developer to the normal mode (see Section 4.5).
(2) When off
Check item Corrective action
Is the power being supplied?
Is the capacity of the power supply module adequate?
Has a watchdog timer error occurred?
Confirm that the supply voltage for the power supply module is within the rated range.
Calculate the current consumption of the CPU module, I/O module and intelligent function module mounted on the base unit to see if the power supply capacity is adequate.
Reset the programmable controller CPU and verify that it is lit. If the RUN LED does not light even after doing this, the module may be malfunctioning. Contact the nearest distributor or branch office with a description of the problem.
Check the mounting condition of the module. Is the module correctly mounted on the base unit?
Is a module change enabled during an online module change?
Refer to Chapter 7 and take corrective action.
8.2.2 When the "ERROR" LED is on or flashing
(1) When on
Check item
Is an error being generated?
(2) When flashing
Check item
Is intelligent function module setting switch 5 set to "other than 0"?
Corrective action
Confirm the error code and take corrective action described in Section 8.1.
Corrective action
Using GX Developer parameter setting, set intelligent function module setting switch 5 to "0" (see Section 4.5).
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8.2.3 When the digital output values cannot be read
Check item
Is there any fault with the analog signal lines such as disconnection?
Is the CPU module in the STOP status?
Are the offset/gain settings correct?
Is the input range setting correct?
Is the resolution mode setting correct?
Is the A/D conversion enable/disable setting for the channel that was input set to A/D conversion disabled?
Has the operating condition setting request (Y9) been executed?
Corrective action
Check for faulty condition of the lines visually and perform a continuity check of the signal lines.
Set the CPU module to the RUN status.
Verify that the offset/gain settings are correct (see Sections
4.6, 5.6.2 and 5.6.3).
If the user range is being used, switch to a different default input range and check if A/D conversion is correctly performed. If it is correctly performed, redo the offset/gain settings.
Check buffer memory addresses 20 and 21 (Un\G20 and
Un\G21) in GX Developer system monitor.
If the input range setting is incorrect, redo the GX Developer intelligent function module switch setting (see Section 4.5).
Check the ON/OFF status of the high resolution mode status flag (X8) in GX Developer system monitor.
If the resolution mode setting is incorrect, redo the GX
Developer intelligent function module switch setting. (See
Section 4.5.)
Check the ON/OFF status with buffer memory 0 (Un\G0) in
GX Developer system monitor and review the initial setting of the sequence program or utility package (see Section
3.4).
From GX Developer, set the operating condition setting request (Y9) from ON to OFF, and check that the digital output values are stored in buffer memory addresses 11 to
18 (Un\G11 to Un\G18). If so, review the initial setting of the
Sequence program or utility package (see Section 3.3).
POINT
The module may be faulty if the digital output values cannot be read after proper corrective actions have been taken according to the above check items. Consult the nearest representative or branch.
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8.2.4 Checking the A/D converter module status using GX Developer system monitor
When the A/D converter module detail information is selected in GX Developer system monitor, error code, LED ON status and status of the intelligent function module switch setting can be checked.
(1) Operating GX Developer
[Diagnostics] [System monitor] "Select A/D converter module"
Module's Detailed Information
(2) Module Detail Information
(a) Checking the function version
The function version of the A/D converter module is displayed in the product information field.
(b) Checking the error code
The error code stored in buffer memory address 19 (Un
\
G19) of the A/D converter module is displayed in the Present Error field.
(When the Error History button is pressed, the contents displayed in the
Present Error field are displayed in the No. 1 field.)
Function version
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(3) H/W information
(a) H/W LED information
The LED ON status is displayed.
Status
1 RUN 0000
H
: Indicates that LED is unlit.
2 ERROR
H
: Indicates that LED is lit
(b) H/W SW information
The status of the intelligent function module switch setting is displayed.
No. Switch setting for intelligent function module
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