KEYENCE CB-EP100 - Manual (Page 49)

3-3 Cyclic communication
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- EtherNet/IP Network Unit CB-EP100 User’s Manual (LJ-V7000 Edition) -
Inputting control data to a measuring instrument
„ Example of the handshake process common to control data input
Device assignments: "Control Data (62 Words (124 Bytes)) assembly instance
(Instance ID): 65H" (Page 3-20)
Target control data: Trigger, batch start, batch end, reset, memory clear, storage
start, and storage stop
The "***" shown below indicates the specific control input.
Example: During trigger processing, "*** request" indicates a "trigger request."
(1) When the value of the OUT area with control data assigned changes from 0 to 1,
the measuring instrument starts the requested process by cyclic communication.
(2) When the measuring instrument completes the requested process (or the process
fails), the status bit that indicates control data completion (or failure) becomes 1.
(3) When the value of the OUT area with control data assigned changes from 1 to 0,
the status bit that indicates control data completion (or failure) becomes 0.
(4) The time when the measuring instrument is performing the requested process.
„ Example of the handshake process for error clear request
(1) When the value of the OUT area with an error clear request assigned changes
from 0 to 1, the measuring instrument starts the error clear process by cyclic
communication.
(2) When the measuring instrument completes the requested process (or the process
fails), the status bit that indicates error clear completion (or failure) becomes 1.
(3) When the value of the OUT area with an error clear request assigned changes
from 1 to 0, the status bit that indicates error clearing completion (or failure)
becomes 0.
(4) The time when the measuring instrument is performing the requested process.
PLC 1
*** request 0
*** completion
(*** failure) 1
0
Measuring instrument
*** process Processing
(4)
(1) (2)
(3)
PLC
1
Error clear request
Bit 0 of OUT area [0] 0
1
Error clear completion (or failure)
Bit 0 of IN area [53] 0
Error code
16-bit data of IN area [84 to 85] 1234H 0000H
Measuring instrument
Error clear process Processing
(1) (2)
(4)
(3)