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22
Data Areas for PC Link Systems
Section 2-5
Even though these LR Area words can be used as work words, we recom-
mend reserving all LR Area words for the Link functions only in order to avoid
future conflicts and simplify maintenance.
• Example:
In a single-level system with 128 bits/Unit, up to 8 PC Link Units can be
mounted with node addresses 0 to 7. If the highest actual node address is
5, the LR Area words allocated to node addresses 6 and 7 can be used
as work words.
Even if any of the node addresses between 1 and 4 are not being used, the
LR Area words allocated to those node addresses can not be used as work
words.
The following table shows the usage of the LR Area in this case.
Status Flags for the
PC Link System
PLC Run Flags
The PLC Run Flags can be read from any PLC in the system to determine the
operational status of each PLC in which a PC Link Unit is mounted. Each PLC
Run Flag is ON when the corresponding PLC is operating normally or OFF
when the corresponding PLC is stopped.
A flag status of ON indicates that the PLC is operating in RUN or MONITOR
mode, so the flag will be turned OFF if the PLC is in RUN or MONITOR mode
and an error occurs. A flag status of OFF indicates that the PLC is in PRO-
GRAM mode or an error has occurred.
The PLC Run Flags are output to bits 00 to 07 of the first 4 words of the CPU
Bus Unit Area and are read-only. (Bits 08 to 15 of these words contain the PC
Link Error Flags.)
• PLC Run Flags in a Single-level System (N = PC Link Unit’s unit number)
Link Relay words
Node
address
Unit
mounted
Usage
CIO 1000 to CIO 1007
0 (Polling
Node)
Yes
PC Link
CIO 1008 to CIO 1015
1
No
PC Link (Overwritten during
refreshing)
CIO 1016 to CIO 1023
2
Yes
PC Link
CIO 1024 to CIO 1031
3
No
PC Link (Overwritten during
refreshing)
CIO 1032 to CIO 1039
4
Yes
PC Link
CIO 1040 to CIO 1047
5
Yes
PC Link
CIO 1048 to CIO 1055
6
No
Can be used as work words.
CIO 1056 to CIO 1063
7
No
Can be used as work words.
Word in CPU Bus Unit Area
Bit
07
06
05
04
03
02
01
00
CIO 1500 + 25
×
N
Node 31
Node 30
Node 29
Node 28
Node 27
Node 26
Node 25
Node 24
CIO 1500 + 25
×
N + 1
Node 23
Node 22
Node 21
Node 20
Node 19
Node 18
Node 17
Node 16
CIO 1500 + 25
×
N + 2
Node 15
Node 14
Node 13
Node 12
Node 11
Node 10
Node 9
Node 8
CIO 1500 + 25
×
N + 3
Node 7
Node 6
Node 5
Node 4
Node 3
Node 2
Node 1
Node 0
Содержание CVM1 Series
Страница 1: ...Cat No W434 E1 01 SYSMAC CVM1 CV Series CVM1 LK401 PC Link Unit This manual is PDF file only...
Страница 2: ...CVM1 LK401 PC Link Unit Operation Manual Produced July 2004...
Страница 3: ...iv...
Страница 5: ...vi...
Страница 41: ...26 Differences from Earlier PC Link Units Section 2 6...
Страница 77: ...62 Replacement Checklists Section 3 6...
Страница 95: ...80 Link Adapter Specifications Appendix B...
Страница 101: ...86 PC Link System I O Response Time Appendix C...
Страница 103: ...88 PC Link Settings and Status Areas Appendix D...
Страница 105: ...Revision History 90...