2 Functions of Devices in DVP-PLC Note : (1) After the reading/writing of the data is complete, M1164 is automatically set to Off. After the reading/writing of the data is complete, the following flags are On. M1189 The data which is read/written is correct. M1075 An error occurs when the data is written into the backup area. Before replacing the PLC, please read M1006 No data or program is in the memory card. the program and the data form the main operation area first. (2) Enter the function code in D1064 first, and then set M1164 to On. Otherwise, M1164 is automatically reset to Off. (3) If an error occurs during the reading/writing of the data, the special M will be set.
No error LED indicator will flash or no situation in which the MPU can not run occurs. Therefore, if customers need an alarm, please make the warning message on the device or superior machine according to the flags above. (4) Owing to the fact that the storage material of the backup area is Flash ROM, it takes some execution time to write the data into the memory card. (5) When the program is copied, the MPU automatically copies the password function (including the main password, the limit on the number of errors, the subroutine password, and the PLC ID). Function Group Operational Error Flag Number M1067 ~ M1068, D1067 ~ D1068 Contents: 1. Operational error flag: 2. Error code explanation:
DVP-PLC Application Manual 2-89 M1164 state D1064 code Function On 0xAB55 The data in D2000~D11999 in the operation area is copied to the backup area. 0x8888 The data in the backup area is cleared.
Device Description Latched STOP → RUN RUN → STOP M1067 Operational error flag None Cleared Latched M1068 Operational error locked flag None Latched Latched D1067 Operational error code None Cleared Latched D1068 STEP value when operational error occurs None Latched Latched D1067 error code Cause H’ 0E18 BCD conversion error H’ 0E19 Divisor is 0 H’ 0E1A Use of device exceeds the range (including E, F index register modification) H’ 0E1B Square root value is negative H’ 0E1C FROM/TO instruction communication error