6. EtherCAT Settings 6.3. Allocations of I/O Memory Areas The I/O allocations of the Digital Sensor Communication Unit are as follows: Input area 3900 3904 (Digital Sensor Communication Unit → PLC) 10 bytes ▪Details on output area No output area is allocated. ▪Details on input area •Read input 1st word 3900 •Read input 2nd word 3901 •Sensor Status bits 3902 •Sensor Status(Warning Status) 16 bits 3903 3904 8 Address Bit Function name Description 3900 15 to 0 Read input 1st word Sensor unit No. 1 Sensor Input 1 Sensor unit No. 1 Sensor Input 2 Sensor unit No. 8 Sensor Input 1 Sensor unit No. 8 Sensor Input 2 3901 15 to 0 Read input 2nd word Sensor unit No. 9 Sensor Input 1 Sensor unit No.
9 Sensor Input 2 Sensor unit No. 16 Sensor Input 1 Sensor unit No. 16 Sensor Input 2 3902 7 to 0 Sensor Status bits Sensor status 15 to 8 Connecting Sensor bits Number of Sensors setting (register at power-on) 3903 7 to 0 Number of Sensors setting with dummy 15 to 8 Sensor Status 16 bits Warning status (Sensor unit No. 1 to 8) 3904 7 to 0 Warning status (Sensor unit No.
9 to 16) 15 to 8 Reserved Reserved 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Sensor 8 Sensor 7 Sensor 6 Sensor 5 Sensor 4 Sensor 3 Sensor 2 Sensor 1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Sensor 16 Sensor 15 Sensor 14 Sensor 13 Sensor 12 Sensor 11 Sensor 10 Sensor 9 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 IN2 IN1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 (Number of Sensors setting) 0 0 0 0 0 0 S ERR _ BUSY 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Sensor unit No. (Number of Sensors) 7 6 5 4 3 2 1 0 (Reserved) Sensor unit No. 15 14 13 12 11 10 9 8