24
SOCOMEC - Ref. : 875 092A
Address
Totalizing meters
METERS DISPLAY
Pulse meters for power demand storing
Decimal
Hexadecimal
N° of words (1)
Description
Unity
768
300
2
Meter 1
770
302
2
Meter 2
772
304
2
Meter 3
774
306
2
Meter 4
in energy metering
776
308
2
Meter 5
778
30A
2
Meter 6
780
30C
2
Meter 7
782
30E
2
Value between 2 signals for input 1
Pulses
784
310
2
Value between 2 signals for input 2
786
312
2
Value between 2 signals for input 3
788
314
2
Value between 2 signals for input 4
Zone size (1): 22 words in decimal or 16 in hexadecimal.
0.01 kWh
and no value in pulses
DISPLAY (FUNCTION 3)
METERS
NB:
A maximum of 60 words can be read
in one frame.
COMMUNICATION
The Countis Ci system communicates via a JBUS/MODBUS
®
protocol invol-
ving a master/slave dialogue. Two dialogues are possible:
• the master communicates with a slave (Countis Ci) and waits for its response,
• the master communicates with all the slaves (Countis Ci) without waiting for
their response.
The communication mode is the RTU mode (Remote Terminal Unit) with
hexadecimal characters consisting of 8 bits.
NB:
• The integration time must not exceed
3 silences (the time taken to transmit
a character) for the message to be
processed.
• By selecting slave address 0, the
same message is transmitted to all
the Countis devices present on the
network (only for functions 6 and 16).
COMMUNICATION FORMAT
Slave address
Function code
Address
Data
CRC16
3
to read n words (128 maximum )
6
to write a word
8
to diagnose master/slave exchanges from meters 1, 3, 4, 5 and 6
16
to write n words (128 maximum)
This is a standard format consisting of:
The following functions are essential in order to make full use of information:
