Omron M1 Series User Manual page 661

8-5
Explanation of Each Function Code
8-5-1
Read Coil Status [01 hex]
Reads the coil status (ON/OFF).
Example) Reading Data from Multifunction Input Terminals DI1 to
DI7 of Inverter with Slave Address 1
The status of each multifunction input terminal is as follows.
Coil No.
Multifunction input terminal
Coil status
Coil numbers 0008 to 000D hex are a reserved area.
 Query
No.
1
Slave address
2 Function code
3
Coil start address (MSB)
4
Coil start address (LSB)
5 Number of coils (MSB)
6 Number of coils (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
*1. Broadcasting cannot be performed.
*2. Note that the coil start address is 0002 hex, which is 1 less than the coil number 0003 hex: Coil start
address = Coil number - 1.
 Response
No. Field name
1
Slave address
2 Function code
3 Number of data bytes
4
Coil data 1
5
Coil data 2
6 CRC-16 (MSB)
M1 Series Standard Type User's Manual (I669)
Item
0003
hex
DI1
ON
Field name Example (hex)
*1 01
01
*2 00
*2 02
00
0C
9D
CF
Example (hex)
*1 01
01
02
*2 08
*2
05
7E
8 Communications Functions
Data
0004 0005 0006
hex hex hex
DI2 DI3 DI4
OFF ON OFF
Remarks
(Coil address) = (Coil number) − 1
Remarks
Input terminal Input terminal
D7, D6 D5 to D1
← 805 hex = 1000 0000 0101
Reserved
0007 000E 000F
hex hex hex
DI5 DI6 DI7
OFF OFF ON
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