Panasonic Micro-Imagechecker AX40, User Manual

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242
RS232C Co
mmunication
Cha
p
ter 1
1
Note for the settings of PLC
• If the PLC does not allow data writing in RUN mode, the AX40 cannot write data, resulting in
communication error. If you use the PLC that can allow or forbid the AX40 to write data, set to allow
data writing.
• Mitsubishi A- and Q- series PLC
You can use only the special protocol for MELSEC A-series computer link unit, “Format 4”, to
communicate properly (Formats 1, 2, 3, 5 and the special protocol for Q series are not available).
Make sure that Format 4 is set in the PLC and the settings are valid. Also, set Sum checke to "Yes".
• Store “0” in the register for specifying communication format
Register for specifying communication format: D8120 (or D5420)
• If you use Allen-Bradley SLC500, configure the following settings:
- Duplicate Detect: OFF
- ACK Timeout (*20 ms): 20
- Control Line: NO HANDSHAKING
- Error Detect: BCC
- NAK Retries: 3
- ENQ Retries: 0
- Embedded Responses: AUTO DETECT
(Only integer registers are available.)
Connecting with PLC
Refer to page 28 for serial connection with the PLCs in previous page.
Be sure to connect the following parallel signals:
• Ready signal (RDY)
• Error signal (ERR)
Output Data
The data that can be output by using the computer link function is as follows:
Data Descriptions
Judgement The results of numeric calculation assigned to "D1 to D8" for output under Judgement
regardless of "Output Data" settings. Judgement is output in digit unit. (Up to four results
are stored per data register.)
Data Monitor The data of numerical calculation or statistics referred to Data Monitor which are set to
"Output". Starting from the leftmost cell in the first row, they are output from left to right
by rows through the last row. The output unit is 16-bit or 32-bit.