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INTRODUCTION
General purpose
This document provides required information of the J
JB
BU
US
S/
/M
MO
OD
DB
BU
US
S protocol serial link.
Before connecting a supervision equipment or BMS system (Building management system) to the UPS, it is
necessary to install and set up the serial interface.
This interface is located in the DELPHYS MX / MP « com-slot », and should be set through the control
panel or via the graphic touch screen (optional).
DELPHYS MX / MP is able to manage up to 2 independent J
JB
BU
US
S/
/M
MO
OD
DB
BU
US
S serial links.
JBUS/MODBUS protocol
This document does not explain the J
JB
BU
US
S/
/M
MO
OD
DB
BU
US
S
protocol management. Please refer on
www.modbus.org web site for more information.
The DELPHYS MX / MP
J
JB
BU
US
S/
/M
MO
OD
DB
BU
US
S uses the following functions :
- function 3 for reading Input Registers (16 bits),
- function 6 for writing single Registers (to control UPS).
The data field is composed of words, defined by a MSB (most significant byte) and a LSB (lowest
significant byte), and displayed in the following order on the serial link.
1 WORD DATA
b7MSB b0
b7LSB b0
b15 b0
Data decoding
Status and alarms Information
This information are coding in bit. This means that 1 word defines 16 information. If the related bit is set to
1, this information is active or true.
Measurements and counters data
1 word defines a measurement or a counter. Some values are numeric decimal signed or unsigned (0 to
65535 or from -32767 to 32767), or in hexadecimal (0x0000 to 0xFFFF).
