NAiS FP2 - Link Relay and Link Register Allocations

5-6
5.2.3
Link Relay and Link Register Allocations
Link relays and link registers used with the PC(PLC) link function are allocated to the link area of CPU.
The link area is allocated by specifying the system register for the CPU.
System registers
No. Name
Defaul
t value
Setting range
40
Specification of range of link relays used for
communication
0 0 to 64 words
41
Specification of range of link registers used for
communication
0 0 to 128 words
42
Starting number for link relay transmision
(No. of first word)
0 0 to 63
43 Link relay transmission size 0 0 to 64 words
44
Starting number for link register transmission
(first number )
0 0 to 127
45 Link register transmission size 0 0 to 128 words
46 PC(PLC) link switching flag
Stan-
dard
Standard: 1
st
unit
Reverse: 2
nd
unit
For
PC(PL
C)
link 0
47 Setting of max. unit No. for MEWNET-W0 PC(PLC) link 0 0 to 16
Note)
46 PC(PLC) link switching flag
Stan-
dard
Standard: 2
nd
unit
Reverse: 1
st
unit
50
Specification of range of link relays used for
communication
0 0 to 64 words
51
Specification of range of link registers used for
communciation
0 0 to 128 words
52
Starting number for link relay transmission
(No. of first word)
64 64 to 127
53 Link relay transmission size 0 0 to 64 words
54
Starting number for link register transmission
(first number)
128 128 to 255
55 Link register transmission size 0 0 to 128 words
For
PC(PL
C)
link 1
57 Setting of max. unit No. for MEWNET-W0 PC(PLC) link 0 0 to 16
Note)
Note) The same number must be specified as the maximum unit No. for all the PLCs with PC(PLC) link.
Link area configuration
• Link areas consist of link relays and link registers, and are divided into areas for PC(PLC) link 0 and
PC(PLC) link 1 and used with those units.
• The link relay which can ben used in an area for either PC(PLC) link 0 or PC(PLC) link 1 is maximum
1024 points (64 words), and the link register is maximum 128 words.
Note:
Link areas are the shared areas for MEWNET-W0 (supported by MCU) and MEWNET-W (supported by
Multi-wire Link Unit). Therefore, the PC(PLC) link modes with MEWNET-W0 and MEWNET-W are
limited up to 2 systems in the combination of PC(PLC) link 0 and 1.
Reference:
For the details on MEWNET-W, refer to <FP2 Multi-wire Link Unit Manual ARCT1F284>.