Omron CVM1 Series, Operation Manual

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23
Data Areas for PC Link Systems Section 2-5
• PLC Run Flags in a Multi-level System (N = PC Link Unit’s unit number)
PC Link Error Flags • The PC Link Error Flags indicate communications errors with other PC
Link Units. After the PC Link is established, an Error Flag will be ON when
there is a transfer error or a power interruption occurs in the correspond-
ing PC Link Unit. The Error Flag will be OFF when the PC Link Unit is
operating normally.
• If an error occurs when the power is turned ON and the PC Link is not
established, these flags will not operate and will all remain OFF.
• The Error Flags will not be turned ON when a PLC is stopped by execu-
tion of a FALS(07) instruction. In this case, use the PC Run Flags to iden-
tify the stoppage.
• The PC Link Error Flags are output to bits 08 to 15 of the first 4 words of
the CPU Bus Unit Area and are read-only. (Bits 00 to 07 of these words
contain the PLC Run Flags.)
• PC Link Error Flags in a Single-level System
• PC Link Error Flags in a Multi-level System
Level Flags
These flags can be used to check the operating level setting (link number set-
ting) of the PC Link Unit(s) mounted in the PLC. The flags contained in the
fifth word of the CPU Bus Unit Area and are read-only.
Word in CPU Bus Unit
Area
Link Bit
07 06 05 04 03 02 01 00
CIO 1500 + 25
×
N Link #1 Node 15 Node 14 Node 13 Node 12 Node 11 Node 10 Node 9 Node 8
CIO 1500 + 25
×
N + 1 Node 7 Node 6 Node 5 Node 4 Node 3 Node 2 Node 1 Node 0
CIO 1500 + 25
×
N + 2 Link #0 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
Word
(
N: Unit number
)
Bit
15 14 13 12 11 10 09 08
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
Word
(
N: Unit number
)
Link Bit
15 14 13 12 11 10 09 08
CIO 1500 + 25
×
N Link #1 Node 15 Node 14 Node 13 Node 12 Node 11 Node 10 Node 9 Node 8
CIO 1500 + 25
×
N + 1 Node 7 Node 6 Node 5 Node 4 Node 3 Node 2 Node 1 Node 0
CIO 1500 + 25
×
N + 2 Link #0 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
Word
(
N: Unit number
)
Bit Description
CIO 1500 + 25
×
N + 4 11 ON when the PLC contains is a PC Link Unit that is
set to multi-level operation Link #1.
12 ON when the PLC contains is a PC Link Unit that is
set to single-level operation or multi-level operation
Link #0.