User`s manual

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Specification comparison of CPU Basics

MELSEC System Q, Hardware 2 – 11

2.2.6 Motion CPU

The motion controller CPU of System Q controls extensive movements by the connected servo

amplifiers and servo motors. They only work in a multi-CPU system together with minimum one

PLC CPU. Therefore maximum three Motion CPU modules can be mounted on one main base

unit.

Q172CPUN and Q173CPUN

Tab. 2-7: Specification comparison of Q172CPUN and Q173CPUN

Q172HCPU and Q173HCPU

Tab. 2-8: Specification comparison of Q172HCPU and Q173HCPU

Q172CPUN Q173CPUN

No. of I/O device points (usable on program) 8192 8192

Real I/O points

(I/O in Main and Extension Base Units)

256 256

No. of control axes 8 32

Operation cycle With software SV13 0.88 ms (1 to 8 axes) 0.88 ms (1 to 8 axes)

1.77 ms (9 to 16 axes)

3.55 ms (17 to 32 axes)

With software SV22 0.88 ms (1 to 4 axes)

1.77 ms (5 to 8 axes)

0.88 ms (1 to 4 axes)

1.77 ms (5 to 12 axes)

3.55 ms (13 to 24 axes)

7.11 ms (25 to 32 axes)

Program memory 14 k steps 14 k steps

Shared memory for multi-CPU operation 8 kByte 8 kByte

Shared memory for high speed data transfer in

multi-CPU operation

——

Memory cards Not usable Not usable

Power consumption (5 V DC) 1.14 A 1.25 A

Weight 0.22 kg 0.23 kg

Dimensions (HxWxD) [mm] 98x27.4x114.3

Q172HCPU Q173HCPU

No. of I/O device points (usable on program) 8192 8192

Real I/O points

(I/O in Main and Extension Base Units)

256 256

No. of control axes 8 32

Operation cycle With software SV13 0.44 ms (1 to 3 axes)

0.88 ms (4 to 8 axes)

0.44 ms (1 to 3 axes)

0.88 ms (4 to 10 axes)

1.77 ms (11 to 20 axes)

3.55 ms (21 to 32 axes)

With software SV22 0.88 ms (1 to 5 axes)

1.77 ms (6 to 8 axes)

0.88 ms (1 to 5 axes)

1.77 ms (6 to 14 axes)

3.55 ms (15 to 28 axes)

7.11 ms (29 to 32 axes)