Chapter 2 Devices 2.2.7 Special Auxiliary Relays (SM) Every special auxiliary relay has its specific function. Do not use the special auxiliary relays which are not defined. The special auxiliary relays and their functions are listed as follows. As to the SM numbers marked “*”, users can refer to the additional remarks on special auxiliary relays/special data registers. “R” in the attribute column indicates that the special auxiliary relay can read the data, whereas “R/W” in the attribute column indicates that it can read and write the data. In addition, the mark “–” indicates that the status of the special auxiliary relay does not make any change.
The mark 2_ “#” indicates that the system will be set according to the status of the PLC, and users can read the setting value and refer to the related manual for more information. 2-11 AS300 Series AS200 Series Latched Attribute Default OFF STOP RUN SM Function ON RUN STOP SM0 Error: the operation or operand exceeds the allowed range ○ ○ OFF OFF – N R OFF SM1 Error: the operation or operand exceeds the allowed range is locked.
○ ○ OFF OFF – N R OFF SM5 Instruction inspection error ○ ○ OFF OFF – N R OFF SM6 Data lost in the latched area ○ ○ OFF – – N R/W OFF SM7 Insufficient power supply (24 V) ○ ○ OFF – – N R OFF *SM8 Watchdog timer error ○ ○ OFF – – N R OFF SM9 System error ○ ○ OFF – – N R OFF SM10 I/O bus error ○ ○ OFF – – N R OFF *SM22 Clearing the error log ○ ○ OFF OFF OFF N R/W OFF SM23 Clearing the download log ○ ○ OFF OFF OFF N R/W OFF SM24 Clearing the state-changing log of the PLC ○ ○ OFF OFF OFF N R/W OFF SM25 The online-editing processing flag is on when the online-editing mode starts. ○ ○ OFF – – N R OFF SM26 The debugging mode processing flag is on when the debugging mode starts.
○ ○ OFF – – N R OFF SM28 Error: the output point is the same as the output that the high speed instruction used ○ ○ OFF OFF OFF N R/W OFF SM30 Error in the remote module ○ ○ OFF – – N R OFF SM34 Incorrect password ○ ○ OFF – – N R/W OFF *SM36 Enable saving data to the memory card. When ON, the PLC runs according to the value in SR36. ○ ○ OFF – – N R/W OFF SM76 The data is sent through Function Card 1. ○ - OFF OFF – N R/W OFF SM77 The data is sent through Function Card 2.
○ - OFF OFF – N R/W OFF SM78 Waiting to receive the reply through Function Card 1 ○ - OFF OFF – N R OFF SM79 Waiting to receive the reply through Function Card 2 ○ - OFF OFF – N R OFF SM80 Reception through Function Card 1 is complete. ○ - OFF OFF – N R/W OFF SM81 Reception through Function Card 2 is complete. ○ - OFF OFF – N R/W OFF SM82 Error during receiving data through Function Card 1 when using the MODRW instruction or the RS instruction. ○ - OFF OFF – N R OFF SM83 Error during receiving data through Function Card 2 when using the MODRW instruction or the RS ○ - OFF OFF – N R OFF