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Q172DCPU Mitsubishi MELSEC-Q Series Motion CPU
Discontinued by Mitsubishi Electric (Factory Automation) — we can still source the original Q172DCPU (new, used or refurbished, subject to availability). Request a quote below.
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Quick facts
| Availability | Confirmed on request |
| Category | Mitsubishi MELSEC-Q Series – CPU |
| Lifecycle | Discontinued |
| Warranty | 12-month (new) · 3-month (used/refurbished) |
Shipping & availability
Can I still buy the Q172DCPU now that it is discontinued?
Yes. Mitsubishi Electric (Factory Automation) has discontinued the Q172DCPU, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.
When can Q172DCPU be shipped?
Q172DCPU is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up Q172DCPU in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for Q172DCPU and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for Q172DCPU, subject to availability and destination.
The Mitsubishi Electric Q172DCPU is a motion CPU in the MELSEC-Q Series. Maximum number of control axes: 8 axes , SSCNET III connection. Mitsubishi Electric has discontinued it (2026/03 Discontinued); PartnerPLC sources discontinued Mitsubishi parts on the surplus market for maintenance of existing machines. Specifications and manuals below are Mitsubishi Electric's own data.
Specifications
Product
| Series | MELSEC-Q Series |
| Category | Motion CPU |
| Type | Motion controller |
| Subtype | SSCNETⅢ |
| Sales status | 2026/03 Discontinued (Mitsubishi Electric) |
| Outline | Maximum number of control axes: 8 axes , SSCNET III connection |
Control specifications
| Number of control axes | Up to 8 axes |
| Interpolation function | Linear interpolation (up to 4 axes), 2-axis circular interpolation, helical interpolation (3 axes) |
| Control method: SV13/SV22 | Positioning control, speed control, speed-position switching control, fixed-pitch feed, constant speed control, position follow-up control, speed control with fixed position stop, speed switching control, high-speed oscillation control, synchronous control (SV22) |
| Control method: SV43 | Positioning control, constant speed positioning, high-speed oscillation control |
| Acceleration/deceleration processing | Automatic trapezoidal acceleration/deceleration, S-curve acceleration/deceleration |
| Compensation function | Backlash compensation, electronic gear, phase compensation (SV22) |
| Programming language: SV13/SV22 | Motion SFC, dedicated instruction, Mechanical support language (SV22) |
| Programming language: SV43 | EIA language (G-code) |
| Program (dedicated instruction capacity): Servo program: SV13/SV22 | 16k steps |
| Program (dedicated instruction capacity): Motion program: SV43 | 504 k bytes |
| Number of positioning points: SV13/SV22 | 3200 points (positioning data can be set indirectly) |
| Number of positioning points: SV43 | Approx. 10600 points (positioning data can be designated indirectly) |
| PERIPHERAL I/F | Via a PLC CPU (USB/RS-232) |
| Home position return function | Proximity dog method (2 types), count method (3 types), data set method (2 types), dog cradle method, stopper method (2 types), limit switch combined method (home position return re-try function provided, home position shift function provided) |
| JOG operation function | Provided |
| Manual pulse generator operation function | Possible to connect 3 modules |
| Synchronous encoder operation function | Possible to connect 8 modules (SV22 use) |
| M-code function | M-code output function provided, M-code completion wait function provided |
| Limit switch output function | Number of output points 32 points Watch data: Motion control data/word device |
| ROM operation function | Provided |
| Absolute position system | Made compatible by setting battery to servo amplifier. (Possible to select the absolute data method or incremental method for each axis) |
| Number of SSCNET III lines *1 | 1 line |
| Number of Motion related modules | Q172DLX: 1 module usable Q172DEX: 4 modules usable *2 Q173DPX: 3 modules usable *3 |
Module specifications
| Number of control axes | Up to 8 axes |
| Operation cycle (default): SV13 | 0.44 ms/1 to 6 axes 0.88 ms/7 to 8 axes |
| Operation cycle (default): SV22/SV43 | 0.44 ms/1 to 4 axes 0.88 ms/5 to 8 axes |
| Servo amplifier connection method | SSCNET III (1 line) |
| PERIPHERAL I/F | Via a PLC CPU (USB/RS-232) |
| Manual pulse generator operation function | Possible to connect 3 modules of manual pulse generator |
| Synchronous encoder operation function | Possible to connect 8 modules *5 (SV22 use) |
| Controllable modules: Q172DLX | Up to 1 module per CPU |
| Controllable modules: Q172DEX | Up to 4 modules per CPU (SV22 use) |
| Controllable modules: Q173DPX | Up to 3 modules per CPU (incremental synchronous encoder use in SV22) Up to 1 module per CPU (only manual pulse generator use) |
| Controllable modules: QX_/QX_-S1/QY_/QH_/QX_Y_ | Total: up to 256 points per CPU |
| Controllable modules: Q6_AD_/Q6_AD-_/Q6_DA_/Q6_DA-_ | Total: up to 256 points per CPU |
| Controllable modules: QI60 | Up to 1 module per CPU |
| Number of stages of extension base | Up to 7 stages |
| 5 V DC internal current consumption [A] | 1.25 |
| Mass [kg] | 0.33 |
| Exterior dimensions [mm] | 98.0 (H) × 27.4 (W) × 119.3 (D) |
Downloads & documentation
Official documents from Mitsubishi Electric (Factory Automation), downloaded directly from the manufacturer.
Data sheets & manuals
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