Advertisement
5. LINKING TO AN ACPU AND AN AJ71 PT32-S3
MELSEC-A
5.1.3
Precautions when constructing the system
(1)
Use twisted-wire-pair cables to connect an AJ71PT32-S3 (master
module) and an A64RDC.
When twisted-wire-pair cables are used, the maximum connecting dis-
tance between stations varies with the size of the cables used.
0.2 mm2 to smaller than
0.5
mm2
:
50
m
0.5
mm2 and larger
:
1 0 0 m
(2) The A64RDC requires an external power supply
of 24 VDC. Use the
A66PC power supply module
or a general-purpose stabilized power
supply (24 VDC).
If one power supply is connected
to two or more
A64RDC modules or remote I/O modules, selecting the proper cables
and wiring route, taking the voltage drop due to cables into considera-
tion.
Section 3.1.3 (3) explains how to calculate voltage drops.
(3) An AJ71PT32-S3 (master module) having a software version
of B or
later can be connected to the A64RDC. Any module whose software
version is A or unspecified on the front of the module cannot be used.
Hardware version
- E
Software version
(4)
In an AJ71PT3243
system, do not use
the final slot
of the seventh
extension stage to attach the A3CPU (P21/R21).
Use the AJ71PT32-S3 (master module) in the EXTENSION mode (48
occupied points). Be sure
to mount the initial data ROM storing the total
number of remote stations and remote terminal data (set station numbers
of remote terminal modules and corresponding remote terminal numbers)
to the master module.
5 - 4
Advertisement
