Taco VR15

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MODBUS SPECIFICATIONS • 12.3
Data protocol Modbus Remote Terminal Unit (RTU) ---
Modbus connector Screw-less terminals 2+1 pins. See section 16.3 “Connection to Modbus”
Modbus connection type RS-485 ---
Modbus wire conguration Two-wire + common Conductors: A, B and COM (Common). See section 16.3 “Connection to Modbus”.
Communication transceiver Integrated, 1/8 of standard load Connect either via passive taps or daisy chain.
Maximum cable length 1200 m See section 16.5 “Termination”.
Lag (Secondary) Pump address 1-247 Default is 245, settable over Modbus. See section 16.4 “Speed, parity and address”.
Line termination Not present
Line termination is not integrated. For low speed/short distance,
termination can be omitted. Otherwise, terminate the line externally
on both ends.
Supported transmission speeds
1200, 2400, 4800, 9600,
19200, 38400 baud
Settable over Modbus register [default=19200].
Start bit 1 Fixed.
Data bits 8 Fixed.
Stop bits 1 or 2 1 stop bit minimum, up to 2 when parity not enabled [default=1]
Parity bit Even/odd/none [default=Even]
Modbus visual diagnostics LED2
Flashing yellow when data reception detected. Combined (OR)
with Ethernet ACT function.
Max. number of Modbus devices 247 Limited by possible Modbus addresses to 247. 1/8 nominal load enables 256 devices.
Max. Modbus packet size 256 bytes Including address (1) and CRC (2) bytes.
Isolation
Common ground (COM) with SET1,
SET2 and SET3.
Modbus shares common ground with other signals.
ETHERNET SPECIFICATIONS • 12.4
Ethernet connector RJ-45 10BASE-T, 10Mbit/s connection.
Connection type and services
- Web server (port 80)
- Firmware update over web interface
- Optional Modbus RTU over TCP/IP
Default IP address 192.168.0.245 192.168.0.246 for right twin pump.
Ethernet visual diagnostics
LED1 / LINK Slowly blinking when module is powered, permanently lid when link established.
LED2 / ACT
Flashing yellow when data reception detected.
Combined (OR) with Modbus data reception indication.
MODE SELECTION SWITCH
Adjustment 10 position rotary switch
Position read at power-on.
Used for relay conguration and module conguration reset.
BACNET SPECIFICATIONS • 12.2
Baud Rate 38400 (default)
MAC Address 45 (default)
Device Instance 12345 (default)
Network IP 192.168.0.245 (default)
MAC 02:01:36:BF:42:AD (default)
Gateway 192.168.0.1