Remarks – Sharp JW-20CM User Manual

Page 111

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13

(2) Communication delay time

The communication data on the satellite net may have the delay shown below.

Delay of input module

Time required for PC to detect input state (one operation cycle max.)

Operation time of sending PC (one operation cycle)

Time to complete sending of operation result (one communication cycle max.)

Time required for receiving PC to write receive data in PC data memory

(one operation cycle max.)

Operation time of receiving PC (one operation cycle)

Delay of output module

Communication delay time is the total time of

to

above.

The buffer memory contents of the JW-20CM is renewed for each PC operation cycle.

Therefore, a contact point which turns “ON” for only one operation cycle of a PC may not be

transferred.

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PC00

PC01

I / O

PC00

JW-20CM

JW-20CM

P C 0 1

I / O

Operation cycle

(Communication)

Remarks

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