Omron FH series User Manual page 340

Output Control: Handshaking
Example: Three Data Items Set for Parallel Data Output
STEP signal
BUSY signal
OR signal
DO0 to DO15 signals
GATE signal
DSA signal
1
Turn ON the STEP signal while the BUSY signal is OFF.
2
Measurement begins and the BUSY signal is turned ON during the measurement process.
3
Turn ON the DSA signal from the external device to request data transmission after the STEP
signal turns ON.
*1: A timeout error will occur if the DSA signal is not turned ON within the set timeout interval from when the output data
was output by the Output Unit in the measurement flow. (1))
4
After measurement is completed, the OR signal is output based on the measurement result
and the BUSY signal is turned OFF.
5
Measurement data is output when a Parallel Data Output Unit in the measurement flow is
executed.
6
The GATE signal is turned ON if the DSA signal is ON after data output processing.
*2: A delay of up to 1 ms will occur when the GATE signal is turned ON. (This applied only to the FH.)
7
The user (PLC) reads the data and turns OFF the DSA signal when the GATE signal turns ON.
8
The GATE signal turns OFF if the DSA signal is turned OFF.
*3: If you do not turn OFF the DSA signal within the specified timeout time after the GATE signal turns ON, a timeout error
will occur. (2))
9
If more than one data item is being output for one measurement and you do not turn ON the
DSA signal within the specified timeout time after the GATE signal turns OFF, a timeout error
will occur. (3))
338
Parallel Communications
The signal is turned OFF when
ON
the BUSY signal turns ON.
OFF
ON
OFF
Execution of the Parallel Data Output Unit
Delay time
ON
(1 ms max.)
OFF
Gate ON
delay [ms]
ON
OFF
Timeout time (1))
A timeout error will occur if the DSA
signal is not turned ON within the set
timeout interval from when the output
data was output by the Output Unit in
the measurement flow.
*1
ON while the measurement process is being executed.
Overall judgement (Output when measurements
have been completed regardless of the DSA signal.)
Data 0 Data 1
Timeout time (3))
A timeout error will occur if more than one data
item is being output for one measurement and
the DSA signal does not turn ON within the
specified time after the GATE signal turns OFF.
Timeout time (2))
If the DSA signal does not turn OFF within the specified time
after the GATE signal turns ON, a timeout error will occur.
*3
Vision System FH/FZ5 Series User's Manual
Data 2
*2
for Communications Settings (Z342)