IAI America ERC3 - Manual (Page 399)

Chapter 10
Appendix
10.1
Input and Output Response Performance When PIO
Converter is Used
389
Chapter 10 Appendix
10.1 Input and Output Response Performance When PIO Converter is Used
When controlling ERC3 with using PIO converter, there is a delay in the response time as described
below;
1) Input Delay Time of PIO Converter
The digital input time constant with the hardware is 2ms at maximum. The digital input filter time
with the firmware is 5ms at maximum. Therefore, there is 7ms of input response time in total for
PIO converter.
2) Communication Cycle Time (I/O Update Time) of PIO Converter
5ms at maximum is required for the communication cycle time of PIO converter under the
condition that there is no failure in the communication. The cycle time should be 10ms at
maximum with a communication error occurred.
3) Delay Time in Output Operation
There should be no delay time in the digital output operation of the firmware. It outputs the output
data received from ERC3 in communication cycle every time.
Considering the time described above, the timing for the input and output signals should be as
shown below;
PIO Converter Input
Delay Time 1) (MAX.7ms)
Communication Cycle Tim
2) (MAX.5ms)
ERC3 process time
Control signal
Status signal
Control signal
Status signal
Control signal
Status signal
Program on host controller
such as PLC
PIO converter
ERC3
PLC Input Delay Time
(depends on PLC settings)
PLC Input Delay Time
(depends on PLC settings)
Communication Cycle Tim
2) (MAX.5ms)
Communication Cycle Tim
2) (MAX.5ms)