Wire-Saving Mode - Omron V680-HAM91 User Manual

Section 3
Functions

Wire-saving Mode

The Wire-saving Mode enables detecting read data signals and normal/error completion signals using only 16
data outputs (OD0 to OD15). Using this mode enables controlling reading 16-bit data using only one 16-point
Input Unit for a PLC or a wire-saving device.
System Configuration Example: Combination and Usage of I/O Lines in Each Mode
• Normal Read Wiring: DATA READ 1
Number of Required I/O
Output Units: 1
Input Units: 2
INHIBIT/TRIG
• For Wire-saving Mode, outputting all zeros on the data lines (0000 hex) is used as communications
control, and outputting all ones on the data lines (FFFF hex) is used as an error completion output.
Normal completion (NORMAL/STRB) is detected by confirming that the output from the data lines is
not all zeros (0000 hex) and not all ones (FFFF hex).
• All zeroes (0000 hex) and all ones (FFFF hex) cannot be used as data when Wire-saving Mode is
used.
• Error codes cannot be output when an error completion occurs. The data indicators, however, will
flash red to show the error code.
• The parity output is not connected and cannot be used.
• The Wire-saving Mode cannot be used when Trigger 2 or Auto 2 Mode is used. Attempting to do so
will result in a settings error.
RFID System
30
User's Manual
Output Unit
Input Unit 1
Input Unit 2
NORMAL/STRB, ERR,
PARITY (3 points)
OD0 to OD15 (16 points)
V680-HAM91/
V680-HAM81
• Wire-saving Read Wiring: DATA READ 2
Number of Required I/O
Output Units: 1
Input Units: 1
Output Unit
Input Unit
INHIBIT/TRIG
OD0 to OD15 (16 points)
V680-HAM91/V680-HAM81