Product Features
Process CPU Modules, Redundant Function Module
The process CPU module is part of the application-specific range in the MELSEC iQ-R Series and has four CPUs available with memory sizes from 80K to 1200K steps. It is designed specifically for medium- to large-scale process control systems requiring high-speed performance coupled with the handling of large PID loops. When paired with a redundant function module, a highly reliable (redundant) control system can be realized with a tracking data capacity of up to 1 M words between the control and standby systems supported. The SIL2 process CPU also realizes a redundant system conforming to IEC 61508 SIL 2 safety standard.
DCS style features in a cost-efficient automation control system
The specialized CPU inherits its high performance from the MELSEC iQ-R Series when used together with the centralized programming suite GX Works3 and iQ Works. The process control system incorporates a dedicated process instruction set (such as two-degree-of-freedom PID, sample PI, and auto-tuning), realizing algorithmic PID and highly reliable features such as being able to interchange (hot-swap) I/O modules while the system is still online and large-scale process control with a maximum of 300 loops, closely bringing it in line with DCS capabilities without the financial burden.
Redundant system remote location and high-speed switching
Optical-fiber tracking cables enable the standby system to be installed in a remote location up to 550 m from the control (primary) system. The tracking cables are immune to noise interference and support fast data transfer rates. System switching speed from the control system to standby system has also been improved to speeds of 10 ms or less, further improving system reliability.
Improve reliability with reduced single-point failure
A multi-level redundant system can be realized by installing dual control systems consisting of the control (primary) and standby CPUs. Combined with a dual extension cable topology for both the redundant extension base units and network cabling of the CC-Link IE Field networks together with dual remote stations, minimizes the risk of singe-point failure. Online replacement of cables and modules (hot-swapping) is possible without stopping the operating control system when an error occurs.
Efficient engineering through extensive compatibility between software
An efficient and highly-scalable engineering environment can be realized by the extensive compatibility between GX Works3 together with SCADA software GENESIS64™, monitoring software GT SoftGOT and GT Works3 [GOT (HMI)].
■ Highly scalable process control visualization
Process tag labels (variables) can be shared between GX Works3, SCADA software GENESIS64™, GT SoftGOT2000, and GOT2000, realizing an efficient engineering environment that makes screen creation easier. In addition, a scalable SCADA control system can be realized combining these products.
■ Integrated engineering software realizing easy programming and maintenance
GX Works3 is a centralized programming environment supporting various programming, debug and maintenance features, thereby enabling efficient engineering. Multiple programming languages can be used within the same GX Works3 project, including function block diagram (process control programming), ladder, structured text and sequential function chart.
Process CPU module specifications
: Ladder diagram : Structured text : Function block diagram : Sequential function chart
Item | R08PCPU | R16PCPU | R32PCPU | R120PCPU |
---|---|---|---|---|
Control method | Stored program cyclic operation | |||
I/O control mode | Refresh mode (Direct access I/O is available by specifying direct access I/O (DX, DY) ) |
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Programming language | LD ST FBD SFC | |||
Extended programming language | Function block (FB), label programming (system/local/global) | |||
Program execution type | Initial, scan, fixed scan, interrupt, standby | |||
Number of I/O points [X/Y] (point) | 4096 | 4096 | 4096 | 4096 |
Constant scan (ms) (Function for keeping regular scan time) |
0.2...2000 (Setting available in 0.1 ms increments) |
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Memory capacity | ||||
Program capacity (step) | 80K | 160K | 320K | 1200K |
Program memory (byte) | 320K | 640K | 1280K | 4800K |
Device/label memory (ECC type)*1 (byte) | 1188K | 1720K | 2316K | 3380K |
Data memory (byte) | 5M | 10M | 20M | 40M |
Instruction processing time | ||||
LD instruction (ns) | 0.98 | 0.98 | 0.98 | 0.98 |
MOV instruction (ns) | 1.96 | 1.96 | 1.96 | 1.96 |
E + instruction (floating-point addition) (ns) | 9.8 | 9.8 | 9.8 | 9.8 |
Structured text IF instruction*2 (ns) | 1.96 | 1.96 | 1.96 | 1.96 |
Structured text FOR instruction*2 (ns) | 1.96 | 1.96 | 1.96 | 1.96 |
PC MIX value*3 (instructions/μs) | 419 | 419 | 419 | 419 |
Interface connection port | ||||
High-speed USB2.0 (miniB | ● | ● | ● | ● |
Ethernet (100BASE-TX/10BASE-T) | ● | ● | ● | ● |
Memory interface*4 | ||||
SD memory card | ● | ● | ● | ● |
Extended SRAM cassette | ● | ● | ● | ● |
Function*5 | ||||
Multiple interrupt | ● | ● | ● | ● |
Standard PID control | ● | ● | ● | ● |
Process control | ● | ● | ● | ● |
Data logging | ● | ● | ● | ● |
Security function | ● | ● | ● | ● |
Inter-module synchronization*6 | ● | ● | ● | ● |
SLMP communication | ● | ● | ● | ● |
Online module change | ● | ● | ● | ● |
Firmware update*7 | ● | ● | ● | ● |
*2. The IF or FOR sentence of the structured text consists of several instructions, which may increase the processing time period.
*3. Average number of instructions such as for basic instructions and data processing executed in 1 µs. The larger the value, the faster the processing speed.
*4. For more information please refer to the SD memory card and SRAM cassette specifications on “SD memory card specifications”.
*5. Memory dump and real-time monitor are not supported.
*6. Inter-module synchronization is not supported when used in redundant mode.
*7.Depends on supported CPU firmware version, for more information please refer to the relevant product manual.
Redundant function module specifications
Item | R6RFM |
---|---|
Communication cable | Multi-mode optical cable |
Max. distance (m) | 550 (when the core outer diameter is 50 μm) |
Tracking cable data capacity (word) | 1M |
Firmware update*8 | ● |
MELSEC iQ-R Series process control used in industry
MELSEC iQ-R Series process CPU/redundant systems are ideal for various industrial process control applications requiring highly reliable process control solutions that can be easily integrated. Most components are based on the standard range of MELSEC iQ-R Series modules, enabling total cost of ownership to be reduced through utilization of its extensive functions and features.
* Detailed information is displayed when the cursor is placed over the red circle below.