OMRON CS1H-CPU63H CPU Unit

Stato: Interrotto (End of Production). Only available in second-hand/spare parts market.

The CS1H-CPU63H belongs to the SYSMAC CS1H high-performance rack-mounted PLC, equipped with a 32-bit RISC processor. Designed for medium-to-large machines, production lines and process control, it supports multiple expansion racks and a large number of special modules.

✅ Core Specifications

📌 Model Code Definition

CS1: CS-series PLC

H: CPU ad alte prestazioni (CS1G = standard type)

processore: Unità CPU

63: Performance grade, 63 = 20K steps; higher grades:64(30K)/65(60K)/66(120K)/67(250K)

Suffisso H: H-version hardware

🧩 Hardware Architecture & Applicazioni

1. Rack installation: CS1W-BC series CPU backplane + expansion backplanes; CPU plugged into main backplane.
2. Moduli supportati: I/O digitali, analog AD/DA, high-speed counter, positioning modules, communication units (Controller Link, DeviceNet, serial units, ecc.)
3. Applicazioni tipiche: Stampaggio ad iniezione, stamping, linee di assemblaggio, large packaging machinery, HVAC, trattamento dell'acqua, legacy production line retrofits.
4. Software di programmazione: Programmatore CX (CX-P); supports Ladder Diagram, ST structured text, blocchi funzione.

🔁 Official Recommended Replacement Models

Two upgrade options from Omron:

1. CJ2H-CPU64 (in-family replacement, minimum migration effort, preferito)
2. NX102-9000 (new-generation NX series, Sysmac Studio software, full-platform upgrade)

Migration Notes: Memory addresses and instructions are mostly compatible between CS1 and CJ2H, but rack configuration, special unit parameters and communication unit settings need re-verification. NX series requires full program reconstruction.

⚠️ Common Failures & Note sulla manutenzione

1. Battery alarm (A40204): Built-in lithium cell failure; DM/EM/HR data lost after power-off. Replace battery while PLC remains powered.
2. ERC red fatal error: RAM fault, WDT watchdog timeout, I/O unit abnormality, poor backplane connector contact.
3. Failed online connection: Check peripheral port cable, PLC mode switch, CX-P communication driver and CPU firmware version.
4. Second-hand unit inspection checklist:

Power-on RUN/ERR LED status

Battery voltage and RTC clock accuracy

Memory read/write verification, program upload/download test

Backplane connector oxidation and corrosion check

📎 Common Spare Parts List

Backplane: CS1W-BC053/BC083/BC103

Alimentazione elettrica: CS1W-PA204/PA207

Expansion Cable: CS1W-CN series

Batteria: CS1W-BAT01

Communication Protocols Supported by OMRON CS1H-CPU63H

Important distinction: Protocols on CPU native ports (no extra module required) and protocols via optional CS1W communication boards / unità (add-on hardware required). All network messaging is based on FINS (Omron FA Information Service Protocol).

1. Native CPU Ports (Peripheral Port + Built-in RS232C)
2. Collegamento dell'ospite: Traditional Omron serial protocol, used for CX-P and HMI/SCADA to read/write PLC and online programming. Supported on both RS232C and peripheral port.
3. NT Link: Dedicated serial protocol for legacy Omron NT HMIs, supporta 1:1 /1:N multi-panel connection.
4. No-Protocol Communication (TXD/RXD): Free serial transmission of raw ASCII data, for instruments, scanner di codici a barre, weighing transmitters.
5. Serial FINS: Run FINS commands over serial ports for PLC-to-PLC serial interconnection.

Physical interfaces: Mini-DIN peripheral port, D-Sub9 RS-232C. Nessuna porta Ethernet integrata.

2. Optional Communication Boards (Front CPU slot: CS1W-SCB21/SCB41)

RS232C / RS422A/485

Collegamento dell'ospite, NT Link, No-Protocol, Protocol Macro (PMCR). Predefined third-party device protocols (ModBus RTU, custom instrument protocols) configured in CX-Protocol.

Serial FINS

3. Optional Rack-mounted Communication Units (CS1W modules plugged onto backplane)

3.1 Ethernet Unit CS1W-ETN21 (standard Ethernet, NOT EtherNet/IP)

FINS/TCP, FINS/UDP

TCP/IP, UDP/IP Socket (custom socket communication)

FTP service (file upload/download), SMTP email, SNTP time synchronization, Server Web

3.2 EtherNet/IP Unit CS1W-EIP21

Ethernet/IP (CIP protocol, multi-vendor industrial Ethernet)

Also supports FINS/TCP, FINS/UDP, SNMP, FTP, SNTP

3.3 Controller Link CS1W-CLK23/CLK53 (Omron factory LAN)

Controller Link token bus network, N:N data link + FINS messaging for large-volume PLC-to-PLC data sharing and FinsGateway SCADA access.

3.4 DeviceNet CS1W-DRM21

DeviceNet (CIP-based fieldbus, remote I/O, third-party sensors and inverters)

3.5 CompoNet CS1W-CRM21

CompoNet, Omron bit-level high-speed fieldbus for sensors and actuators

3.6 SYSMAC LINK / SYSMAC NET (legacy Omron fiber network, obsolete)

3.7 Serial Unit CS1W-SCU21/SCU41

RS232/485, Collegamento dell'ospite, Protocol Macro, No-Protocol, ModBus RTU (implemented via Protocol Macro)

3.8 PROFIBUS-DP Master Unit CS1W-PRM21

Profibus DP, connect to DP slave instruments and variable frequency drives

4. Third-party Protocols Realized via Protocol Macro PMCR (Seriale)

Not hard-coded native CPU protocol; parsed inside the communication board/unit.

ModBus RTU (Maestro / Schiavo)

Custom ASCII protocols for weighing, barcode, inverter and instrument devices

❗Important: CS1H-CPU63H does NOT natively support Modbus. Modbus RTU requires SCB/SCU serial board plus Protocol Macro. Modbus TCP requires ETN/EIP unit plus custom Socket programming.

5. Protocol Selection Quick Reference

PC programming / old HMI: Collegamento dell'ospite / NT Link (use native serial port)

Serial instruments: No-protocol TXD/RXD or Protocol Macro (SCB board)

Large data exchange between PLCs: Controller Link

Ethernet industriale / SCADA: ETN21(FINS) or EIP21(Ethernet/IP)

I/O remoto, sensor bus: DeviceNet / CompoNet

Siemens DP devices: CS1W-PRM21 PROFIBUS-DP unit

CS1H-CPU63H｜Modbus RTU Configuration via Protocol Macro

Hardware Prerequisite: CS1W-SCB21/SCB41 (CPU front serial board) OR CS1W-SCU21/SCU41 (rack serial module).

CPU native serial port cannot run Protocol Macro for Modbus RTU. SCB/SCU hardware is mandatory.

Software: Protocollo CX (included in CX-One suite) + Programmatore CX

1. Principio di funzionamento

Protocol Macro (PMCR) executes communication sequences inside the SCB/SCU module. The CPU invokes pre-downloaded communication sequences with `PMCR(260)`. The module automatically handles packet assembly, transmission, response waiting, CRC16 checksum and parsing, then stores received data into PLC DM memory.

✅ Capability: Modbus RTU Master (read/write holding registers, input registers, bobine, ingressi discreti)

⚠️ Limitazione: No native Modbus ASCII support. Massimo 20 protocol sets; massimo 60 sequences per protocol.

2. Hardware & DIP Switch Setup
3. Unit Number for SCU: Set via DIP switch (0~F), must match hardware configuration inside CX-P. SCB boards have no unit number and use fixed port addressing.
4. Port Mode: Set port to Protocol Macro, NOT Host Link or No-Protocol.
5. Serial Parameters (Norma ModbusRTU)

8morso, 1 fermati un po', nessuna parità (8,N,1). Odd/even parity is also available.

Velocità di trasmissione: 1200~115200bps, must match Modbus slave exactly.

4. RS485 Wiring: Abilitare le resistenze di terminazione su entrambe le estremità del bus; shield grounded at single point; do not reverse A/B wires, connect A to A and B to B.
5. CX‑Protocol Project Creation Steps
6. Create new protocol project, select CS-series SCB/SCU, create new Sequence.
7. Create Message frames to define Modbus RTU packets:

Frame structure: Indirizzo dello schiavo(1B)+Codice funzione(1B)+Data Field+CRC16(2B)

Enable automatic CRC calculation in CX-Protocol; manual CRC entry is unnecessary.

Common function codes: 01 Read Coils, 02 Read Discrete Inputs, 03 Leggi i registri delle aziende, 04 Read Input Registers, 05 Write Single Coil, 06 Write Single Register, 10H Write Multiple Registers

3. Timing parameter configuration (critico)

Send&Receive: transmit then wait for response

Response timeout: normally 200~500ms (increase for long-distance / low baud rate instruments)

Retry count: 0~3; impostato su 1 retry for noisy field environments

Frame interval: Modbus RTU requires 3.5 character silent interval. CX-Protocol wait time must satisfy this timing requirement.

4. Compile protocol macro and download it into SCB/SCU module (NOT download to CPU program).

Nota: Protocol macro is stored inside serial board/module, not CPU. The CPU only calls sequences. Older modules lose protocol macro after power cycle, re-download required after power up, or use flash-version modules.

4. PLC Programming: PMCR Instruction Call

Instruction format: `PMCR(260) S1 S2 D`

S1: Protocol number + Sequence number (defined in CX-Protocol)

S2: Start address of transmit data (DM area, stores variable parameters: slave address, register start index, lunghezza)

D: Start address for received data storage (DM area, slave response saved here)

Associated Status Word

After PMCR execution, status code is written right after D channel:

0000: Completed normally

0001: Timeout

0002: Receive frame error

0003: CRC check error

0004: Sequence not found

Programming Tip: Trigger PMCR with rising edge, do NOT keep PMCR ON continuously. Wait for completion flag OFF before triggering next poll to avoid bus collision.

5. Insidie ​​​​comuni & Risoluzione dei problemi
6. A/B reversed wiring: No response, PMCR reports timeout (most frequent field issue).
7. Protocol macro not downloaded into SCB/SCU: PMCR returns error. Many users only download ladder program and skip protocol macro download in CX-Protocol.
8. Timing fails 3.5 character gap: Intermittent packet loss and CRC errors, more likely at low baud rates.
9. Multi-slave polling without interlock: Simultaneous transmission causes bus conflict.
10. Wrong port mode selected: Port set as Host Link, PMCR will not execute.
11. Mismatched unit number: SCU unit number in CX-P hardware configuration inconsistent with physical DIP setting.
12. Alternative Solutions for CS1H
13. Protocol Macro PMCR: Modbus RTU master, supports complex polling. Svantaggio: requires CX-Protocol, protocol stored on module and lost on power cycle (older hardware).
14. No-Protocol TXD/RXD: Manually build packets and calculate CRC inside ladder code. Large programming workload; suitable only for single simple device, hard to maintain with multiple slaves.
15. Add ETN21 Ethernet unit: Socket programming to implement Modbus TCP, no RTU support.
16. Reference Manuals

W340 CS1W-SCB21/SCB41 Serial Communication Board Manual

W341 CS1W-SCU21/SCU41 Serial Communication Unit Manual

CX-Protocol Operation Manual W342