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APPENDIX
Appendix 2 Special Register List
Serial communication
The special registers for serial communication are shown below.
R: Read only, R/W: Read/Write
SD8419 Operation mode (ch1) This register stores the operation mode (ch1). R
SD8422 RS2 amount of remaining data (ch2)/MODBUS
communication error code (ch2)
This register stores the amount of remaining data (ch2)/MODBUS
communication error code (ch2).
R
SD8423 RS2 receive data points (ch2)/MODBUS communication
error details (ch2)
This register stores the receive data points (ch2)/MODBUS
communication error details (ch2).
R
SD8425 RS2 receive sum (calculated result) (ch2) This register stores the receive sum (calculated result). R
SD8428 MODBUS communication retry times (ch2) This register stores the MODBUS communication current retry
times (ch2).
R
SD8434 RS2 receive sum (received data) (ch2) This register stores the ch2 receive sum (received data). R
SD8435 RS2 receive sum (calculated result) (ch2) This register stores the ch2 receive sum (calculated result). R
SD8436 RS2 send sum (ch2) This register stores the send sum (ch2). R
SD8438 Serial communication error code (ch2) This register stores the serial communication error code (ch2). R
SD8439 Operation mode (ch2) This register stores the operation mode (ch2). R
SD8492 IP address setting [Low-order] This register stores the IP address. R/W
SD8493 IP address setting [High-order]
SD8494 Subnet mask setting [Low-order] This register stores the subnet mask. R/W
SD8495 Subnet mask setting [High-order]
SD8496 Default gateway IP address setting [Low-order] This register stores the default gateway IP address. R/W
SD8497 Default gateway IP address setting [High-order]
SD8498 IP address storage area write error code This register stores error codes if writing to IP address storage
area is failed.
R
SD8499 IP address storage area clear error code This register stores error codes if clear to IP address storage area
is failed.
R
No. Name Description R/W
SD8500 Serial communication error code (ch1) This register stores the serial communication error code 1 (ch1). R
SD8501 Serial communication error details (ch1) This register stores the serial communication error details 1 (ch1). R
SD8502 Serial communication setting (ch1) This register stores the serial communication setting (ch1). R
SD8503 Serial communication operational mode (ch1) This register stores the serial communication operational mode 1
(ch1).
R
SD8510 Serial communication error code (ch2) This register stores the serial communication error code 2 (ch2). R
SD8511 Serial communication error details (ch2) This register stores the serial communication error details 2 (ch2). R
SD8512 Serial communication setting (ch2) This register stores the serial communication setting (ch2). R
SD8513 Serial communication operational mode (ch2) This register stores the serial communication operational mode 2
(ch2).
R
SD8520 Serial communication error code (ch3) This register stores the serial communication error code 3 (ch3). R
SD8521 Serial communication error details (ch3) This register stores the serial communication error details 3 (ch3). R
SD8522 Serial communication setting (ch3) This register stores the serial communication setting (ch3). R
SD8523 Serial communication operational mode (ch3) This register stores the serial communication operational mode 3
(ch3).
R
SD8530 Serial communication error code (ch4) This register stores the serial communication error code 4 (ch4). R
SD8531 Serial communication error details (ch4) This register stores the serial communication error details 4 (ch4). R
SD8532 Serial communication setting (ch4) This register stores the serial communication setting (ch4). R
SD8533 Serial communication operational mode (ch4) This register stores the serial communication operational mode 4
(ch4).
R
SD8560 Remaining points of send data (ch1) This register stores the remaining points of send data (ch1). R
SD8561 Receive data points monitor (ch1) This register stores the receive data points monitor (ch1). R
SD8563 Receive sum (received data) (ch1) This register stores the receive sum (received data) (ch1). R
SD8564 Receive sum (received result) (ch1) This register stores the receive sum (received result) (ch1). R
SD8565 Send sum (ch1) This register stores the send sum (ch1). R
SD8570 Remaining points of send data (ch2) This register stores the remaining points of send data (ch2). R
SD8571 Receive data points monitor (ch2) This register stores the receive data points monitor (ch2). R
No. Name Description R/W