User Manual PLC-3 FAMILY I/0 Instruction Manual

Appendix
C
C-1
DH and DH+ Command Set
Table C.A lists the DH and DH+ commands supported by the scanner. For
detailed information on using these commands, refer to the DH/DH+
Command Set User’s Manual (publication 1770-6.5.16).
The scanner can transmit 12 different commands on the link. The
addressing method determines which command is to be sent.
Table C.A
Basic
Commands
Addressing Method Command CMD (Hex) FNC (Hex)
PLC2 logical data Protected writeblock 00 N/A
Unprotected readblock 01 N/A
Protected writebit 02 N/A
Unprotected writebit 05 N/A
Unprotected writeblock 08 N/A
PLC3 logical binary
or
Logical ASCII word range
Write block 0F 00
Read block 0F 01
Write bit 0F 02
Write file 0F 03
Read file 0F 04
Logical ASCII data type Write block 0F 67
Read block 0F 68
Introduction