SEW MOVITRAC 31C Installation and Debugging

X3:62: Binary output 2 (factory setting:/fault), maximum load 50 mA

X2:44:+24V auxiliary voltage output (max. 250 mA), used for external switching

X2:40: External 24V input (used to maintain option card diagnosis in case of main power failure)

X2:65: Measurement output (5V TTL, PWM 100 Hz), configurable to display actual frequency, etc

Binary input is optocoupler isolated, compatible with PLC (EN 61131-2), high level+13~+30V, low level -3~+5V.

2.4 EMC compliant installation

To achieve electromagnetic compatibility (compliant with EN 61800-3 Class B limits), the following measures need to be taken:

Control cable: Shielded cable must be used. Large area grounding at both ends of the shielding layer (through shielding clamps or metal cable joints). To avoid ground loops, a 220 nF/50V capacitor can be grounded at one end.

Power and motor cables: laid separately from electronic cables in different cable trays.

Input filter (NF...): Installed near the frequency converter (but not in a ventilated area), the connection between the input filter and the frequency converter should not exceed 400 mm, and unshielded twisted pair cables should be used. If multiple inverters share a filter, the filter must be installed at the entrance of the cabinet or adjacent to the inverter.

Output choke (HD...): Installed on the output side of the frequency converter, only the U, V, and W phases are passed through the choke (PE lines and shielding layers must not pass through). After using the output choke, the motor cable can be unshielded.

EMC module (EF... -503): Integrated with input filters and output chokes, it can be directly installed under or next to the frequency converter, simplifying EMC installation.

2.5 UL compliant installation

For UL certified installations, the following regulations must be followed:

Wire temperature grade:

MOVITRAC ®  31C005-300: Only use 60/75 ° C copper wire

MOVITRAC ®  31C370/450: Only use 75/90 ° C copper wire

Terminal torque:

Size 0:1.5 Nm (13.3 lb · in)

Size 1: 0.6 Nm (5.3 lb · in)

Size 2: 1.5 Nm (13.3 lb · in)

Size 3/4:3.5 Nm (31 lb · in)

Maximum short-circuit current and fuse:

230V unit: maximum 5000 AAC, fuse rated from 20 A (size 0) to 110 A (size 3)

400/500V unit: maximum 5000 AAC (size 0-3) or 10000 AAC (size 4), fuse from 16 A to 400 A

External 24V power supply: Units with limited output voltage (Umax=30V DC) and limited output current (Imax=8A) that have been tested must be used.

IT system: UL certification does not apply to ungrounded star shaped points (IT systems).

2.6 Installation of Option Cards

Size 0 unit without option slot. Units 1-4 in size support the following options:

FEA31C: I/O Expansion (Analog Differential Input, Analog Output, Binary Input/Output, RS-485)

FIO31C: Digital Input/Output Expansion (8 inputs, 4 outputs, RS-485)

FEN31C: Speed detection (incremental encoder interface)

FPI31C: Position detection (incremental encoder, supporting positioning control)

FIT31C: Evaluation of TF/TH Temperature Sensor

FFP31C/FFI31C/FFD31C: fieldbus interfaces (PROFIBUS, INTERBUS, DeviceNet)

FESS31C: Synchronous Operation Control

Before installing the option card, the main power supply and 24V power supply must be disconnected, and ESD protection measures (anti-static wristband) must be taken. To insert FEA/FIO/FES/FFP into slot X20, the system EPROM card needs to be removed first; To insert FEN/FPI/FIT into slot X21, the X14 terminal block needs to be removed first.

Start debugging

3.1 Preparation work

Check the installation to ensure all wiring is correct.

To prevent accidental starting of the motor, the X3 electronic terminal block can be temporarily unplugged.

Connect FBG31C keyboard to X4 slot (for on-site debugging) or connect PC to MC_SHELL software through USS21A option.

Connect the main power supply (and 24V external power supply), and the yellow LED V1 indicates that the frequency converter is ready.

3.2 FBG31C keyboard operation

The keyboard has 5 keys: ↑ (Add/Previous menu), ↓ (Reduce/Next menu), → (Enter submenu/Edit), ← (Return/Exit Edit), Q (Return to Basic Display), E (Fault Reset).

Language selection: Press ↓ three times under the short menu to P850, press → to enter editing, select language (DE/EN/FR), press ← to exit, press Q to return.

Short menu: Factory activated, with a "/" mark after the parameter number, containing only the most commonly used parameters. You can switch to the complete parameter menu through P802.

3.3 Quick Start Process

Set minimum frequency, fundamental frequency, and maximum frequency:

P200 (fmin1)=2-6 Hz (initially set to 5 Hz)

P201 (fbase1)=motor nameplate fundamental frequency (e.g. 50 Hz)

P202 (fmax1)=required maximum frequency (such as 50 Hz or higher)

Enable Drive: Apply+24V signal to X3:43 (Enable) and X2:41 (CW/stop). The motor runs in fmin.

Check the rotation direction: If the direction is incorrect, power off and exchange any two-phase motor wires.

Increase frequency setting value: Increase the frequency to the desired value through analog input or keyboard (manual mode).

Set the ramp time: P120 (t11 ramp up) and P121 (t11 ramp down) based on project data (e.g. 5-10 seconds).

3.4 Manual mode