Communication - socomec DIRIS A20 Bedienungsanleitung

DIRIS A20 - RS485 - JBUS/MODBUS

COMMUNICATION

used by the DIRIS A20 involves
The JBUS/MODBUS ®
a dialogue using a master-slave hierarchical structure.
There are two possible dialogues:
• the master communicates with a slave ( DIRIS ) and
waits for its reply
• the master communicates with all the slaves ( DIRIS )
without waiting for their reply.
THE STANDARD COMMUNICATIONS FRAME
The standard communications frame consists of:
Slave address
According to the JBUS/MODBUS
time must be less than 3 silences, i.e. the emission time
of 3 characters so that the message is processed by
the DIRIS .
To correctly use information, the following functions are
important:
3 : to read n words (maximum 128).
6 : to write one word.
8 : to diagnose exchanges between the master and
the slave via meters 1, 3, 4, 5 and 6.
16 : to write n words (maximum 128).
LIST OF PARAMETERS TO BE DISPLAYED (FUNCTION 3)
Table of values with allocated current and voltage winf-ding ratios on 2 words
Decimal Hexa.
address address
768 300
770 302
772 304
774 306
776 308
778 30A
780 30C
782 30E
784 310
786 312
788 314
790 316
792 318
794 31A
796 31B
798...839 31E...347
838 346
840 348
842 34A
844 34C
846...855 34E...357
856 358
858 35A
860...915 35C...393
916 394
SOCOMEC - Réf. : 876 581 B
®
Function code
® protocol, transmission
Number
of words
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
DIRIS A20 - RS485 - JBUS/MODBUS
The mode of communication is the RTU (Remote
Terminal Unit) using hexadecimal characters of at least
8 bits.
Address Data
NB:
When selecting slave address 0, a message is sent to
all the instruments present on the network (only for
functions 6 and 16).
Text
phase 1 current
phase 2 current
phase 3 current
neutral current
phase to phase voltage U12
phase to phase voltage U23
phase to phase voltage U31
phase to neutral voltage phase 1
phase to neutral voltage phase 2
phase to neutral voltage phase 3
frequency
Σ active power +/-
Σ reactive power +/-
Σ apparent power
Σ power factor
-: leading and +: lagging
Reserved manufacturer
average value I1 max
average value I2 max
average value I3 max
Σ active power + max
Reserved manufacturer
active energy +
reactive energy +
Reserved manufacturer
average value In max
®
CRC 16
Unit
mA
mA
mA
mA
V/100
V/100
V/100
V/100
V/100
V/100
Hz/100
kW/100
kvar/100
kVA/100
0,001
mA
mA
mA
kW/100
kWh
kvarh
mA
23