KEYENCE DV-90 - Manual (Page 206)

9-6 E DV-90-IM
9
PLC Link
9-2 Device Assignment
Details on DM Assignment
„ DM that reports the start of operation to the PLC
• This is the flag that reports the start of operation to the DV-90.
• Write “1” at the time of starting the operation. The DV-90 returns the value to “0” after it is suc-
cessfully processed, and starts the operation.
• Be sure to set the correct initial value of each DM before starting the operation. Refer to “Steps to
take before starting operation” described below.
• During standby, the DV-90 does not perform operations such as receiving data from the code
reader, comparing data with master data, and outputting data.
(Steps to take before starting operation)
The steps to take before starting the operation are described below. After these steps, process the
program for normal operation.
For the contents of each DM, refer to the respective item.
➀Write the following information as the initial settings.
• “X+01 to +03” … Set the data write head address.
• “X+08” ………… Set “0: Real-time processing” or “1: Sequence processing”.
➁Initialize each DM.
• Initialize “X+06”, “X+07”, “X+09”, “X+14”, and “X+17” to “0”.
• Initialize “X+10” to “1: Data write enabled”. (In the case of sequence processing)
• Initialize “X+12” to the active record number at the time of startup. (In the case of active
verification)
➂Set the Work Start Notice Flag.
• When you write “1” in “X+00”, the operation starts.
➃After the operation starts, the DM changes as follows:
• “1: During normal operation” is written in “X+17”.
• After the active record number has been changed, “1” is written in “X+11”. (In the case of
active verification)
DM Description Data description
Writing from
the DV-90
Writing from
the PLC
X+00 Work Start Notice Flag
0: Work standby
1: Work start
Yes
(1
→0)
Yes
(0
→1)
Note
• Once the operation starts, the work standby state cannot be established using “X+00”.
• When the mode changes to the Preset mode, Test mode, or Setting mode with the key
operation on the DV-90, the DV-90 returns to the work standby state. In such a case, write
“1: Work Start” again.
Note
Always write “1” in “X+00” to prevent the work standby state from being established by
mode change.