Modbus RTU inputs (In-A, In-B)
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Data sheet Modbus RTU inputs (In-A, In-B) MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 • Modbus RTU communication • Communication speed up to 115200 bits/s • Programmable data, communication speed and parity settings • Two pulse inputs for additional water and electricity meters • RS-485 galvanic isolated from meter • Complies with Modbus implementation

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Contents Introduction 3 Applications 3 Installation 3 Cable connections Communication from module Modbus datagrams Technical specifications Ordering 9 Configuration 9 Displayed information Modbus register mapping

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Introduction A high performance and flexible Modbus module for the MULTICAL® 403, MULTICAL® 603 and MULTICAL® 803 energy meters. The Modbus communication module enables the MULTICAL® energy meters to be integrated into a building automation system or to participate in industrial applications. The Modbus RTU is based on an RS-485 communication bus. Applications The Modbus module is designed with focus on high flexibility to fulfill a wide pallet of applications. The Modbus module supports rapid exchange of meter data, e.g. flow, energy and...

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Cable connections Terminals Max cable size 1.5 mm² Pulse input Terminal 65: Pulse In A/In-A (+) Terminal 66: Pulse In A/In-A (-) Terminal 67: Pulse In B/In-B (+) Terminal 68: Pulse In B/In-B (-) Modbus Terminal 138: RS-485 B/+ Terminal 139: RS-485 GND Terminal 137: RS-485 A/- Pulse inputs The module is equipped with two pulse inputs, In-A and In-B, to collect and accumulate pulses, e.g. from water and electricity meters. The pulse inputs are physically placed on the module. However, the accumulation and logging of values are performed by the...

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Communication from module Protocol According to the Modbus over Serial Line, Specification and Implementation Guide V1.02. Modbus addressing The module may be addressed as a Modbus slave unit in the range from 1-247. By default, the Modbus address equals the last three digits of the meter’s customer number. If the customer number of the meter results in an address larger than 247, only the last two digits are used for the Modbus address of the module. Note: If the customer number of the meter ends with 000, the Modbus module automatically changes to...

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Modbus datagrams The Modbus module supports the most common registers used for heating and cooling applications. The following module configurations are available: • xx-yy-300: Default datagram for MULTICAL®403, 603 and 803 • xx-yy-301: Legacy datagram makes the meter partly compatible with MULTICAL® 602 • xx-yy-302: MULTICAL® 803 datagram contains additional registers found only in the MULTICAL® 803 and MULTICAL® 803M. The yy denotes the Baudrate and parity/stop bit selection in the configuration. All datagrams are able to handle reading and...

Default datagram Tariff limit TL2 Tariff limit TL3 Tariff limit TL4 Mass M1 Mass M2 Info code Operating hours Error hour counter Date (yy.mm.dd) Time (hh.mm.ss) Config No. 1 Config No. 2 Config No. 3 Config No. 4 Customer No. 2 Customer No. 1 Serial No. Meter type incl. SW edition Meter Main/Sub type Meter SW revision MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Legacy datagram ZERO Cooling energy E3 ZERO Power max year Tarif 2 Tarif 3 Tarif limit 2 Tarif limit 3 ZERO Customer No. 1 Serial No. ZERO ZERO ZERO Operating hours MULTICAL® 803 Volume V2 Pulse input A1 Pulse input B1 Pulse input A2...

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Technical data Physical For installation in MULTICAL® 403, MULTICAL® 603 and MULTICAL® 803. Mechanical data Dimensions (L x W x D) Weight MULTICAL® Supply " Communication Protocol Baud rates Parity, Stop bits Address range Default Data refresh rate Modbus RTU 300 bit/s 2400 bit/s 9600 bit/s 19200 bits/s 38400 bits/s 57600 bits/s 76800 bits/s 115200 bits/s No parity, 1 stop bits No parity, 2 stop bits Odd parity, 1 stop bits Even parity, 1 stop bits 1...247 19200, 8 data bits, even parity 1 stop bit Data from the meter to the module are refreshed...

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Ordering Description Modbus RTU, inputs (In-A, In-B) USB configuration cable for H/C modules Optical read-out head w/USB METERTOOL HCW Configuration Product type of module Communication speed 300 baud 2400 baud 9600 baud 19200 baud 38400 baud 57600 baud 76800 baud 115200 baud Parity/Stop bits No parity 1 stop bit No parity 2 stop bits Even parity 1 stop bit Odd parity 1 stop bit Data content configuration Default datagram Legacy datagram MULTICAL® 803 datagram Reserved

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Displayed information Module information can be read by selecting TECH-loop on the MULTICAL® display. Module in module slot 1: select menu 2-101 in TECH-loop Module in module slot 2: select menu 2-201 in TECH-loop Module in module slot 3: select menu 2-301 in TECH-loop Module in module slot 4: select menu 2-401 in TECH-loop Menu 2-x01 Module type and configuration Module firmware and revision Module serial number Menu index Display example

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Modbus register mapping The various Modbus datagrams are described in details in the data sheet about Modbus registers, 58101758.

MULTICAL® 403 MULTICAL® 603 MULTICAL® 803