Schneider TM221CE40T Compact All-in-One PLC

Positionnement: Modicon M221 series compact integrated PLC, 24VCC alimentation, 40-point I/O, Sortie transistorisée PNP, built-in Ethernet port

✅ Model Code Definition

TM221: Modicon M221 series compact PLC

C: Integrated controller body

E: Ethernet intégré

40: Total 40 Points d'E/S

T: Sortie transistorisée (Type PNP, suitable for servo/stepper drive)

📋 Core I/O Specifications

Alimentation: DC24V (20.4~28,8 V)

Entrée numérique: 24 points DC24V, compatible source/puits; 4 high-speed inputs

Sortie numérique: 16 points PNP transistor DC24V, maximum. 0.5Un par canal; 2 high-speed pulse outputs (for stepper/servo drive)

Built-in analog input: 2AI 0~10V, 10-résolution en bits

E/S totales: 40 on-board I/O points, expandable with TM3 series modules

Local expansion: jusqu'à 7 TM3 modules

Remote expansion: jusqu'à 14 TM3 modules

📶 Communication Interfaces

1. Ethernet Port: Modbus-TCP, connectable to HMI, SCADA, entraînements à fréquence variable
2. Serial port RS232/RS485: Modbus RTU
3. Mini-USB: Téléchargement du programme & débogage
4. Emplacement pour carte SD: Program backup, mise à niveau du micrologiciel, enregistrement de données
5. On-board Run/Stop toggle switch; BR2032 battery for retentive registers

⚙️ Electrical & Données mécaniques

Consommation d'énergie à vide: 4.9W; Max.. 17W with full expansion modules

Expansion bus power supply: 5V/0.52A; 24V/0.3A

Montage: Montage sur rail DIN; Bornes à vis amovibles

Logiciel de programmation: EcoStruxure Machine Expert Basic (formerly SoMachine Basic), compliant with IEC61131-3 (LD, ST, FBD, etc.)

🎯 Typical Applications

Small standalone automation: machines d'emballage, lignes de convoyeurs, équipement auxiliaire de moulage par injection, petites machines-outils, HVAC control cabinets, applications requiring pulse servo control plus Ethernet networking.

Selection note: sibling model TM221CE40R is relay output, no high-speed pulse support, for ordinary contactor loads only.

🧩 Accessories & Options de remplacement

1. Modules d'extension: TM3DI, TM3DO, TM3AI, TM3AQ digital/analog modules
2. Des pièces de rechange: BR2032 battery, SD card, TM3 terminal blocks
3. Performance upgrade alternative: M241 (performances supérieures, more communication interfaces); Remplacement de la même série: TM221CE40R (relay version)
4. Legacy model replacement: Replaces TWIDO series TWDLCAE40DRF

⚠️ General Notes & Dépannage

1. Sortie transistorisée PNP: Only for DC24V loads, AC loads are prohibited; Short circuit on output points will easily burn the channel
2. High-speed pulse: Seulement 2 on-board high-speed outputs, limited pulse frequency. External pulse module recommended for high-power servo
3. Ethernet: Early firmware versions have occasional disconnection issues; firmware upgrade recommended; shielded cable preferred
4. Batterie: Only retains retentive registers, program stored in Flash, program will not be lost after power failure; Flat battery only causes loss of retentive variables
5. Terminaux: Power off before disassembly; Shielded cable for analog input to reduce interference

📌 Selection Comparison Table

EcoStruxure Machine Expert Basic (formerly SoMachine Basic) Program Migration Guidelines

Applicable to TM221CE40T. Four migration scenarios: ① Old SoMachine Basic project → EcoStruxure Machine Expert Basic; ② Legacy Twido program → M221; ③ Program clone/download between identical M221 PLCs; ④ Cross-hardware M221 migration (par exemple. TM221CE40R to TM221CE40T)

1. Software Version Migration (.smbp Project Upgrade)
2. File Compatibility: EcoStruxure Machine Expert Basic can directly open `.smbp` projects from SoMachine Basic with automatic conversion, no manual script conversion required. Conversion report will be generated after opening; prioritize warnings and errors in the report.
3. Version Recommendation

Upgrade old SoMachine Basic to v1.6 SP2 or higher before migration. Projects from older versions risk loss of variables and communication macros during conversion.

Software version ≥ firmware version. PLC firmware must be upgraded to match software version, otherwise download will report firmware incompatibility.

3. Post-conversion Checklist

Variable table: Check retentive variables, system words %SW, system bits %S mapping; some legacy macro variables will be renamed.

Communication macros: Modbus RTU/TCP macros, some legacy macros will be replaced by new library components, parameters need re-verification.

Program editor: LD ladder and ST structured text are mostly lossless; a small number of legacy FBD blocks will trigger warnings.

2. Migrate Legacy Twido (TWIDO) Program to TM221CE40T (Key Section)

Twido (TWDLCAE40DRF) migration workflow: TwidoSuite → export `.xpr/.xar/.twd` → open & import directly in EcoStruxure Machine Expert Basic

⚠️ Twido program cannot be downloaded directly into M221; software conversion is mandatory.

Frequent Pitfalls for Twido Migration

1. I/O address mapping difference: Twido and M221 use different I/O address systems. I/O allocation must be fully rechecked after conversion, especially analog channels.
2. Communication série: Twido serial port parameters and Modbus timing differ from M221 RS485/RS232. Débit en bauds, parity and slave address need reconfiguration; communication macros require manual correction, imported macros cannot run directly.
3. High-speed Pulse (PDF): Twido pulse instructions are not fully compatible with M221 PTO function blocks, this is the most critical point for TM221CE40T migration:

M221 CPU only has 2 on-board PTO pulse outputs;

Pulse frequency, accélération/décélération, homing and limit logic must be retested after migration; legacy Twido pulse macros will be replaced and some parameters lost.

4. System Words %SW: Twido system registers have different definitions compared with M221 %SW, do not reuse directly.
5. Timer/Counter: Difference in resolution and refresh cycle; power-down and retentive behavior need validation.
6. M221 Intra-platform Migration (Same Model / Different M221 CPU)

Scenario A: Download Project from PC to TM221CE40T

1. Configuration matérielle: Controller model in project must be set to `TM221CE40T`; If original project is for TM221CE40R, switching model will trigger PTO block errors (relay CPU has no high-speed output hardware). Either remove pulse logic or change target hardware.
2. Modules d'extension: TM3 module configuration, module sequence and model must match physical hardware on site, or PLC will report hardware mismatch fault.
3. Download channels: MiniUSB, Ethernet, SD card image download.

Upload restriction: If read protection is enabled on original project, program upload from PLC is blocked; only SD card recovery works.

Scenario B: SD Card Clone Migration (Batch Program Copy including Firmware)

For batch replication on multiple identical TM221CE40T units

1. SD card requirement: FAT32 formatted, card name must NOT be DATA (DATA reserved for data logging).
2. Two operation modes:

Mode1: Power PLC to STOP state, insert SD card; PLC automatically clones program + firmware to SD card; cloning is slow under RUN status.

Mode2: Create Controller Image in software on PC, write image file to SD card, firmware can be bundled optionally.

3. SD card restore procedure: Power off and insert card → power on for automatic flashing → SD LED off → power off, remove card and restart PLC.

Important: SD clone erases existing program in target PLC; fault logs and real-time variables will NOT be cloned. Password-protected programs cannot be cloned.

4. PTO Motion Program Migration (TM221CE40T Exclusive Focus)

2 on-board high-speed pulses are core feature of this transistor model; migration errors will lead to servo failure:

1. After migration of legacy pulse logic, verify: Pulse output addresses %PTO0, %PDF1; pulse mode (Pulse+Direction / Dual-pulse).
2. Pulse parameters: Fréquence maximale, accélération/décélération, soft limit, home signal; parameters are prone to missing after migration and must be reconfirmed.
3. Matériel: Sortie PNP, AC loads forbidden on external wiring; short circuit prohibited on pulse terminals.
4. Limitation: M221 on-board PTO only supports point-to-point positioning, no multi-axis interpolation. If legacy logic contains multi-axis interpolation, M221 cannot fulfill it; M241 is required instead.
5. Communication Program Migration (Modbus-TCP / Modbus RTU)
6. Modbus-TCP: M221 built-in Ethernet, Adresse IP, subnet mask and gateway are stored independently in PLC hardware configuration, not in project variables. Downloading project will overwrite PLC IP with project configured value, site original IP will be lost.
7. Modbus RTU (RS485):

Serial terminals and hardware flow control differ from Twido;

For Modbus read/write blocks imported from legacy project, increase timeout and inter-frame gap to mitigate communication loss caused by interference.

3. HMI integration: Export `.smpb` variable file for Vijeo Designer variable linking; Watch Big/Little-Endian order for double words, this is the most common issue for HMI/SCADA communication.
4. Variable & Power-down Retention Migration
5. Retentive variables: Program stored in Flash, no loss after power cycle; retentive registers maintained by on-board BR2032 battery. Dead battery only loses retentive variables, program remains intact.
6. Pre-migration: Export variable table and compare after migration; confirm which variables are marked retentive.
7. Application protection: Read/write protection in project properties. Once read protection enabled, program upload from PLC is impossible; SD card image recovery only. Blank password locks software connection, SD card flashing required to clear protection.
8. Standard Migration Test Procedure
9. Compile: Zero errors, resolve warnings (communication, PDF, system word warnings prioritized).
10. Offline simulation: Run logic in EcoStruxure Machine Expert Basic built-in simulator first.
11. Before hardware download: Switch PLC to STOP; backup original PLC program (SD clone preferred).
12. Télécharger: Après le téléchargement, verify hardware configuration, confirm all TM3 modules are recognized normally.
13. Stepwise test: I/O point test → Modbus communication → PTO pulse/servo positioning → Power-down retention test.
14. Long-term stability: Upgrade PLC firmware to stable release to fix known occasional Ethernet disconnection bug in old firmware.
15. Common Migration Fault List

Deliverables Before & After Migration

9. Pre-migration: Original project backup, PLC program upload backup, SD full image, I/O list, variable table, communication parameter sheet, servo parameters.
10. Post-migration: Conversion report, new source project, exported variable list, test log, firmware version record.

Optional items I can provide separately:

1. Twido to M221 PTO sample code (ST or LD)
2. Full I/O and %SW system register list for TM221CE40T
3. SD card clone operation document for field engineers

Modicon M221 (TM221) Full CPU Model List

Définition du code modèle

TM221C: Standard integrated CPU; E = Built-in Ethernet; No E = Without Ethernet

Nombre: Total des points d'E/S (16/24/40)

R.: Sortie relais; T: Transistor PNP (supports PTO high-speed pulse); U: Transistor NPN

TM221M: Book-style slim M221, side DIN rail mount; ME = with Ethernet

All C/M CPUs come with 2 built-in AI 0~10V, 10-peu

1. Standard Integrated TM221C (Sans Ethernet)

2. Standard Integrated TM221CE (Ethernet intégré, TM221CE40T belongs here)

3. Book-style TM221M / TM221ME (Slim compact, side DIN rail)

4. M221 Compatible TM3 Expansion Modules (Works for all M221 CPUs)

Max.7 TM3 local modules; Max.14 TM3 remote bus modules

1. Entrée numérique: TM3DI8, TM3DI16
2. Sortie numérique: TM3DO8R, TM3DO8T, TM3DO16T
3. E/S mixtes: TM3DM8R, TM3DM24R
4. Analogique: TM3AI2H, TM3AI4, TM3AQ2, TM3AQ4
5. RTD/Thermocouple: TM3TI2, TM3TI4
6. Communication module: TM3RS485BD (serial expansion board)
7. M221 Optional Accessories

Batterie: BR2032 (for retentive registers)

SD Card: Schneider dedicated SD card (program image backup, mise à niveau du micrologiciel)

Special function plug-in card: TMC2PACK01 packaging card / TMC2HOIS01 hoist dedicated card

Terminaux, cover, DIN rail clips

6. Quick Selection Guidelines
7. Servo/stepper pulse required: Suffix T/U; R relay models have no PTO hardware, cannot drive pulse-type servo drives
8. Ethernet networking required: CE / ME models; C / M no Ethernet
9. 4-axis pulse requirement: Only TM221ME32TK / TM221M32TK, all other M221 CPUs support maximum 2 PTO channels
10. Polarité de sortie: T=PNP (most common for domestic DC24V servo, TM221CE40T is this type); U=NPN