88
Communications Commands
Section 6-2
Data Check
Finds the CRC code for the data area from the specified start address to 2
bytes less that the specified number of bytes and writes 2 bytes of data.
From 3 to 2,048 bytes of data can be specified for one command execution.
Note
1.
Verification will not be performed if No Verification is set for writing.
2.
The last 2 bytes of the check area is the check code area. Do not write user
data to these bytes.
3.
Check the memory capacity of the Data Carriers before setting the Pro-
cessing Address and Number of Processing Bytes. If the Processing Ad-
dress and Number of Processing Bytes are not suitable for the Data
Carriers for which communications are being performed, Data Carrier Ad-
dress Error (word (n + 8), bit 13) will turn ON.
Word address
Bit No.
Type
Bit name
Description
Head 1 of
CS1W-
V600C11,
CS1W-
V600C12,
CJ1W-
V600C11,
or CJ1W-
V600C12
Head 2 of
CS1W-
V600C12
or CJ1W-
V600C12
n + 1
n + 11
08 to 15
Command
Command code
07 (hex)
04 to 07
Communications specifi-
cation (Refer to page 52.)
Specify the communications method
with the Data Carrier.
0
Trigger
1
Single auto
00 to 03
Processing Specification
Specify the process.
0
CRC calculation
1
CRC verification
n + 2
n + 12
00 to 15
Processing Address
Specify the Data Check Start address
in the Data Carrier.
n + 3
n + 13
00 to 15
Number of Processing
Bytes
Specify the number of bytes in the data
check range in the Data Carrier plus 2
bytes.
n + 4
n + 14
00 to 15
Data stor-
age area
Data Storage Word
Address (rightmost 4 dig-
its)
Not used
n + 5
n + 15
12 to 15
Data Storage Area
08 to 11
Bank Specification
00 to 07
Data Storage Word
Address (leftmost 2 dig-
its)
n + 6
n + 16
00 to 15
Option
Command Option
Not used
Содержание CJ - 12-2004
Страница 2: ...SYSMAC CS CJ Series ID Sensor Units Operation Manual Revised December 2004...
Страница 3: ...iv...
Страница 11: ...xii...
Страница 55: ...36 Connections and Wiring Section 3 4...
Страница 69: ...50 I O Data Allocations Section 4 3...
Страница 91: ...72 Data Check Section 5 7...
Страница 141: ...122 Sample Programming Appendix B...
Страница 147: ...128 Revision History...