Specifications

I Alarms
Safety Observation Alarms (Y)
I - 34
Y20 Dual signal: comparison ladder transfer error 0021 (Data transfer error code)
Details
The request to transfer data from CNC CPU to PLC CPU was not successfully processed.
<Data transfer error code>
4029, 41CF: The user ladder area does not have enough capacity for dual-signal comparison
ladder to be written in.
4031: Incorrect device size has been set in PC parameter.
413A: There is a possibility that the different version of dual-signal comparison sequence
(SSU_CMP) or partly changed or deleted SSU_CMP was written in the PLC CPU.
Remedy
<Data transfer error code>
4029, 41CF: Check whether the user ladder area has enough capacity. If the area does not
enough capacity, decrease the number of steps in the user ladder and then restart the NC.
4031: Make sure that no change has been made to the device allocation settings of PC pa-
rameter.
Correct the PC parameter and then restart the NC.
Other than above: Contact the service center.
413A: Restart the NC. When SSU_CMP is stored by GX Works2 / GX Developer, reread it
from the CNC CPU.
Y20 Dual signal: comparison ladder transfer timeout 0022 (Data request code)
Details
A timeout error occurred at the data transfer request from CNC CPU to PLC CPU.
This error may occur when a file is being accessed by other devices such as GX Works2 / GX
Developer and GOT.
Remedy
Disconnect the access by other devices and restart the NC.
Y20 Dual signal: comparison ladder compare error 0023
Details
The dual-signal comparison ladder written in PLC CPU is not matched with that in CNC CPU.
A fault of PLC CPU or CNC CPU may cause the error.
Remedy
Contact the service center.
Y20 Dual signal: comparison stop (on PLC) 0024
Details
Dual-signal comparison stopped on PLC CPU.
The following factor may cause the error.
"SSU_CMP" is not entered in the [PLC parameter] - [Program] settings.
Remedy
Correct the settings of PC parameter.
Y20 Dual signal: comparison stop (on NC) 0025
Details
Dual-signal comparison stopped on CNC CPU.
Remedy
Contact the service center.
Y20 Dual signal: output/FB compare error 0026 (Device No.)
Details
The output signal from dual signal module is not matched with the feedback signal.
The following factor may cause the error.
- The dual signal module is not supplied with 24VDC.
(Ex.) When a compare error is detected in Y24/X24 signal, 0024 will be displayed.
When more than one signal are detected, the smallest No. will be dispalyed.
Remedy
Supply 24VDC to the dual signal module.
Make sure that the dual signal output is successfully done, and then restart the NC.
If the error is not cleared by these measures, the dual signal module may have a fault.
Replace the module.
Y20 Dual signal: parameter setting error 0027
Details
The parameter settings are incorrect.
Parameters to check:
"#21125 SSU_num (Number of dual signal modules)"
"#21143 SSU_Dev1 (Dual signal module device1)" to "#21145 SSU_dev3 (Dual signal mod-
ule device3)"
"#2180(PR) S_DIN Speed observation input door No."
"#3140(PR) S_DINSp Speed observation input door No."
Remedy
Correct the parameter settings.
Y20 Dual signal: parameter compare error 0028
Details
Parameters have not been successfully transferred from CNC CPU to PLC CPU.
Parameters to check:
”#21125 SSU_num (Number of dual signal modules)”
”#21142 SSU_delay (Dual-signal comparison tolerance time)”
”#21143 SSU_Dev1 (Dual signal module device1)” to “#21145 SSU_dev3 (Dual signal module
device3)”
Remedy
Contact the service center.
Y20 Dual signal: comparison ladder read error 0029
Details
The controller, when turned ON, cannot read the dual-signal comparison ladder correctly from
the FROM of CNC CPU.
Remedy
Contact the service center.