User's Manual

3. Communicating with the plc
3.1. Command correspondence
3.1.1. Data read
<Master unit to Slave unit>
Signal Length Data Description
CMD 4 0000B Data read
LEN 4 1H to 4H Data length
ADDR 16 0000H to FFFFH Start address
<Slave unit to Master unit>
Signal Length Data Description
NORM 1 0 or 1 Normal completion
ERR* 1 0 or 1 Abnormal completion
ERR_SUB* 1 0 or 1 Abnormal completion for ID tag communication
ID 32 - Read data
<Example>
Data read of 3 bytes from 120H addresses
Output bits
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CIO+0 0 0 0 * * * * * 0 0 0 0 0 0 1 1
CIO+1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0
CIO+2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
CIO+3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Data read
3 bytes
Change the setting if necessary
Fixed
120H address
Fixed
Fixed