Download type A2USHCPU-S1 User's Manual

4. CPU MODULE
4.2
MELSEC-A
Parameter Setting Ranges
A list of parameter setting ranges is provided below. User memory allocation contents, I/O device
allocation method and automatic refresh procedure for MELSECNET/MINI-S3 are also explained.
4.2.1 List of parameter setting range
Parameters are used for allocating the user memory area inside the memory cassette, setting
various functions and device ranges.
A parameter is usually stored in the first 3k bytes of the user memory area.
Among the parameters, the network parameter for MELSECNET/10 is allocated and stored after
the main sequence program area. (Refer to Section 4.2.2 for details).
As shown in the list below, a default value is given to each parameter.
Even though a default value can be used, parameter value can be changed to a value suitable for
a particular application within a setting range by a peripheral device.
Setting
Setting range
Default value
Item
A2USHCPU-S1
Main sequence program capacity
6k steps
1 to 30k steps (1k steps = in 2k-byte units)
File register

0 to 8k points (1k points = in 2k-byte units)
Expansion file register

1 block = 16k bytes
(Block setting for from No.1 to No.8, from No.10 to the end of unused area
in the memory)
[Automatically setup in the unused area in the memory based on the file
register setting.]

Comment capacity
0 to 4032 points (64 point unit = in 1k byte units)
[When comment capacity is set up, 1k byte is added to the memory area.]
Expansion comment capacity

Status latch


Sampling trace
0 to 3968 points (64 point unit = in 1k byte units)
No parameter setting
Performed by setting up expansion file registers to store device and result
in each of status latch and sampling trace modes.
Refer to ACPU Programming Manual (Fundamentals).
Link relay (B)
Timer (T)
Latch range setting
(power failure
compensation)
Counter (C)
B0 to B1FFF (unit: 1 point)
T0 to T255 (unit: 1 point)
• Latch:
L1000 to L2047
only.
T256 to T2047 (unit: 1 point)
C0 to C255 (unit: 1 point)
C256 to C1023 (unit: 1 point)
• None for others.
Data register (D)
D0 to D8191 (unit: 1 point)
Link register (W)
W0 to W1FFF (unit: 1 point)
Optical link: maximum 64 stations
Number of link stations
Link range setting for
I/O (X/Y)
MELSECNET/10
Link relay (B)
Coaxial link: maximum 32 stations

X/Y0 to X/Y1FFF (unit: 16 points)
B0 to B1FFF (unit:16 points)
Link register (W)
Settings for
W0 to W1FFF (unit: 1 point)
M0 to M999
internal relay (M)
M2048 to M8191
M/L/S 0 to 8191
latch relay (L)
L1000 to L2047
(where M, L, S are continuous numbers)
step relay (S)
T0 to T255
None for S
T0 to T199 (100ms) • 256 points by 100ms, 10ms, and retentive timers (in 8 point units)
T200 to T255(10ms) • Timers are continuously numbered.
• 1792 points by 100ms, 10ms, and retentive timers (in 16 point units)
Timer settings
T256 to T2047

• Timers are continuously numbered.
• Devices set: D, R, W (Setting required if 257 points or more.)
Interrupt counter setting
Counter setting
Points used

256 points
(C0 to C255)
• Sets whether to use interrupt counter (C224 to C225) or not.
• 0 to 1024 points (in 16 point units)
• Devices set: D, R, W (Setting required if 257 points or more.)
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