Page 2 / 28
INTRODUCTION
General purpose
This document provides required information of the
J
J
B
B
U
U
S
S
/
/
M
M
O
O
D
D
B
B
U
U
S
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
J
B
B
U
U
S
S
/
/
M
M
O
O
D
D
B
B
U
U
S
S serial links.
JBUS/MODBUS protocol
This document does not explain the
J
J
B
B
U
U
S
S
/
/
M
M
O
O
D
D
B
B
U
U
S
S
protocol management. Please refer on
www.modbus.org
web site for more information.
The DELPHYS
MX / MP
J
J
B
B
U
U
S
S
/
/
M
M
O
O
D
D
B
B
U
U
S
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
b7
MSB
b0 b7
LSB
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).
