Omron FH series User Manual page 33

Controlling Data Output with Handshaking
If handshaking is used to control data output, the timing of outputting the data is controlled by I/O signals.
Each time that data is output, read the output data and move it to a different part of I/O memory in the
PLC.
Refer to Data Output Control with Handshaking (p.32).
Note
For ASCII data output through non-procedure communications, you can append a record separator after each output
data item. (The default is the delimiter.)
The following two types of output units can be used via parallel communications:
Output unit
Parallel Data Output
Parallel Judgement Output
Parallel Data Output Units and Parallel Judgment Output Units are output in the order they are processed
in the measurement flow.
Outputting Multiple Items with Parallel Data Output
The items that are set for output data numbers 0 through 7 via parallel data output are output to the PLC
reception buffer in ascending order, one data item at a time (16-bit units). Each time a data item is output, the
GATE signal turns ON.*1
When this occurs, the first data item that was output to the PLC reception buffer (data 0) is overwritten by the
next output data item (data 1).
Therefore, the data output to the PLC reception buffer must be saved to PLC memory each time the GATE
signal turns ON for each data item.
Parallel data output
0. Measurement data 0
7. Measurement data 7
*1: The operation of the DSA signal depends on whether handshaking for output control is enabled. Reference: Data Output
Control with Handshaking (p.32).
Vision System FH/FZ5 Series User's Manual
for Communications Settings (Z342)
The measurement data is output. A maximum of eight items can be output.
The judgement results are output. A maximum of 16 judgement result
items can be output. The following two types of judgement results can be
output:
• Judgement results for specified processing items
• Judgement results of set judgement conditions for the specified item
values
16 bits
DO0 to DO15
Measurement
signals
data 0
ON
GATE
signal
OFF
Output data
Data output order
Measurement
data 7
Control Methods Using an External Device
PLC
Reception
buffer
1
31