WB-MCM16 pulse counter module with Modbus RTU
The model is discontinued. Recommended replacement - WB-MCM8. Buy WB-MCM8 in the online store
Purpose
The module of discrete and counting inputs 16-channel WB-MCM16 is designed to connect signals of dry contact and open collector, connection of metering devices of water, electricity, gas, etc. with pulse outputs.
No pre-configuration of input modes is required. There is protection against overfilling of the pulse counter.
Version: housing on DIN-rail (width 3 units). Supply voltage 12 – 24V
The module is controlled from the controller or PC via the RS-485 bus by MODBUS commands, as well as by external buttons.
Technical specifications
- 16 digital inputs with pulse counting support with built-in voltage sources
- Minimum pulse duration: 21ms, maximum pulse frequency: 25 Hz
- Group galvanic isolation of inputs from RS-485 interface, up to 1.5 kV.
- Supply voltage: 11 to 24 V.
- Power consumption: 0.3 W.
- Interface: RS485, Modbus RTU.
- Save counter values when power is off
- Led indication for power and data exchange
- Install in the electrical panel on a DIN rail, housing width 3 DIN.
| Terminals and wire section | |
|---|---|
| Recommended wire cross-section with TSVI, mm2 | 0,75 — 1 |
| Length of the standard sleeve NSVE, mm | 8 (10 for adjusting screwless terminal blocks) |
| Torque of screws, N∙m | 0,2 (for screw terminals) |
Operating conditions
- Air temperature from -40°C to +50°C;
- Relative humidity up to 92%,without moisture condensation.
Connection
The module is made in a plastic case and is designed for installation in a mounting box on a DIN rail. The scheme of inputs is shown in the figure. The terminal is supplied ~ 4.5 V, when the earth current flows a small (1.5 mA), causing the operation of the input.
To be done...
Management
See Modbus protocol
Bus parameters.
Speed 9600 bit/s, data - 8 bit, parity – no, stop bit - 2.
Modbus commands supported by the device
| Command | command (dec) |
|---|---|
| READ_DISCRETE_INPUTS | 2 |
| READ_HOLDING_REGISTERS | 4 |
| READ_HOLDING_REGISTERS | 3 |
| WRITE_SINGLE_REGISTER | 6 |
| WRITE_MULTI_REGISTERS | 16 |
Address change is broadcast (slave_id 0) team record (WRITE_SINGLE_REGISTER) to holding register with address 128 (0x80).
The address 200 has a 6-byte signature. The signature is unique for each device model and allows you to identify the model. To obtain the signatures necessary to fulfill READ_HOLDING_REGISTERS address 200 length 6. Writing to this area of memory is not supported and error 3 is returned when attempting to write to an invalid location.
Register map
| Регистр / адрес (dec) | тип | чтение/запись | формат | назначение |
|---|---|---|---|---|
| 0 | discrete input | R | 1 or 0 | состояние входа #1 |
| ... | ||||
| 15 | discrete input | R | 1 or 0 | состояние входа #16 |
| 20 - 23 | input/holding | R | 64-битное целое без знака. Big-endian порядок байт. 4 регистра на канал | счетчик импульсов на входе #1. |
| ... | ||||
| 80 - 83 | input/holding | R | 64-битное целое без знака. Big-endian порядок байт. 4 регистра на канал | счетчик импульсов на входе #16. |
| 100 | holding | RW | регистр сброса. Запись 1 в регистр приводит к сбросу всех счётчиков на всех каналах | |
| 200-206 | input/holding | R | {'W','B','C',M','1','6'} | сигнатура |
| 220-243 | input/holding | R | __date__ __time__ | дата сборки прошивки |
| 128 | holding | W | 1-247 | адрес Modbus |
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Изображения и чертежи устройства
По ссылкам ниже вы можете скачать изображения и чертежи устройства WB-MCM16.
Corel Draw 2018: WB-MCM16.cdr.zip
Corel Draw PDF: WB-MCM16.cdr.pdf
Autocad 2013 DXF: WB-MCM16.dxf.zip
Autocad PDF: WB-MCM16.pdf