KEYENCE DV-90 - Manual (Page 235)

9-35 E DV-90-IM
9
PLC Link
9-7
PLC Link Troubleshooting
When communication cannot be established via the PLC link, perform the following steps.
➀Read data with the code reader. Is the read data displayed?
z
When the read data is not displayed, this indicates that communication between the code reader
and the DV-90 is not established. Check Steps 1 to 3 in “2-1 Flow of Connections and Settings”
( Refer to 2-2).
z
If the read data is displayed, proceed to the next step.
➁Does the screen to the right appear one minute after the code reader has read the data?
z
When “PLC Link Error” occurs, proceed to 3.
z
When “PLC Link Error Invalid DM” occurs, pro-
ceed to 6.
z
If “PLC Link Error” is not displayed even after one minute, this indicates that communication
has been established on the PLC link. Proceed to 7.
➂Check the settings of the DV-90 and the PLC’s communication unit.
Check the settings of the DV-90 and the PLC’s communication unit by referring to “9-5 About
the Settings” (page 9-26).
Use the initial settings of the DV-90 for the baud rate, data length, parity, and stop bit. The initial
settings of the DV-90 vary depending on the PLC manufacturer.
Check the initial settings on page 9-26.
➃Check the wiring of the cables between PORT2 of the DV-90 and the PLC’s communication unit.
Refer to page 3-10.
➄Check the setting of the “DM Address” set in the DV-90.
Check that the setting is within the range supported by the DV-90 and the PLC.
For the range that the DV-90 supports, refer to page 9-3.
Note that the range of “DM Address” +25 is used (when the DM head address is 100, the range is
between DM100 and DM125), so the DV-90 and the PLC should support this range.
➅The values to be written in the DMs of the “DM Address” specified in the DV-90 +01, +02, and
+03 indirectly specify the head address in which the data read by the code reader is written.
( Refer to 9-7.)
When the “DM Address” set in the DV-90 is “100”, if “1000” is written in DM101, the read
data can be written from DM1000.
P L C L i n k E r r o r
[ E S C ]
P L C L i n k E r r o r
I n v a l i d D M [ E S C ]
Example