Panasonic PV500 User Manual page 387

When the Handshake Function Is Set to "Yes"
Use STROBE signal (PV500 -> the external device) and ACKNOWLEDGE signal (The external device ->
PV500) in pairs.
Tf: 400µs (fixed)、Tp: Data output guarantee time, 1-1000ms (default: 10 ms)
To: Timeout period, 4 - 20000 ms (default: 5000 ms)
Exceeding this time causes a timeout error, terminates output processing, and outputs ERROR 0 signal.
1. As the inspection ends, the first data is output through I/O interface and turned on STROBE signal
and TACT signal.
2. As for an external device, obtain the first result after more than 1 ms of wait time(*) when
STROBE signal turns on, and turn on ACK signal.
Be sure to turn on ACK signal in the time of "To" after turning on STROBE signal.
(*) The time from when Strobe signal turns on till when the result output (Out signal) is determined
varies according to the condition of the connected load or ambient temperature.
3. PV500 checks that ACK signal is ON and turns off STROBE signal.
4. Check STROBE signal if OFF with the external device and turn off ACK signal in the time of "To".
PV500 outputs the second (last) data in 100μsec (Td) after turning off ACK signal.
5.
6. As the time of "Tf" passed from data output, turn on STROBE signal and READY signal.
When synchronous output is operated in addition to I/O output, including data output to COM.0 port and
Ethernet port, and inspection image output, READY signal stays OFF until the operation is completed.
7. As for an external device, obtain the second result after more than 2 ms of wait time(*) when
STROBE signal turns on, and turn on ACK signal.
Be sure to turn on ACK signal in the time of To after turning on Strob signal.
8. PV500 checks that ACK signal is ON and turns off STROBE signal and TACT signal. Setting
"Parallel I/O Output Reset Condition" to "Reset" resets OUT signal at this timing.
Check STROBE signal is OFF with the external device and turn off ACKNOWLEDGE signal. If the time
from turning on of TACT signal is less than "Tp", wait until the time passes and turn off TACT signal.
9. I/O result output is complete after the time of "Tp+Tf" passes from TACT signal turns off.
You cannot output the next result while the time of "Tp+Tf" is passing in Parallel mode, and the device is in
the status of waiting for output.
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