Bernard Integralbus, Instructions For Use Manual, Page: 6 / 23

10 11
7 COmmANDS AND SIgNALLINg
Commands and signalling are coded on 2 command and 2 signalling bytes.
The available informations are the following :
(*) option
7.1 COmmANDS
Valve control by the Profibus fieldbus is possible only if the actuator rotating selector is on the «remote»
position.
Conditions which can prevent a command to be executed :
- Actuator rotating selector on «local» or «OFF»
- Alarm tripped (motor thermal overload)
- Emergency command received (ESD)
Command byte description
Commands slightly varies according to the type of controls mounted on the actuator.
INTEGRAL CONTROLS (on-off)
Adress 0 :
POSIGAM / MODUGAM (positioner)
Adress 0 :
Adress 1 : proportional command (set-point)
Notes :
STOP : if this command is maintained at 0 (most common case), the open and close commands
have to be maintained. If this command is set to 1, a short duration open / close command pulse
is sufficient to drive the valve to the open or closed position. In this case, the STOP command (0)
can be used to stop the actuator during the travel in its current position.
CLOSE / OPEN :
Open and Close command
According to the actuator configuration, it is possible to select a priority to the opening or to the closing
command (refer to NR1088).
I
Remote control
Open, close, stop
• • •
Position set point • •
Local control inhibition • • •
AUTO / ON-OFF selection • •
Remote signalling
Position feedback
• (*) • •
Power supply on • • •
End of travel limit - Open • • •
End of travel limit - Closed • • •
Indication relay 1 status • • •
Indication relay 2 status • • •
Indication relay 3 status • • •
Indication relay 4 status • • •
Fault relay • • •
Local control
Open, close, stop
• • (*) • (*)
Separated hardwired command
Open / close emergency command (ESD)
• • •
Bit n° Value Description
Bit 1
0 STOP (MAINTAINED COMMAND MODE)
1 NO STOP (PULSE COMMAND MODE)
Bit 2
0 NO COMMAND
1 CLOSE COMMAND
Bit 3
0 NO COMMAND
1 OPEN COMMAND
Bit 4
0 NO COMMAND
1 LOCAL CONTROL (ACTUATOR SELECTOR) INHIBITED
Bit 5 to 8 - NOT USED
Bit n° Value Description
Bit 1
0 STOP (MAINTAINED COMMAND MODE)
1 NO STOP (PULSE COMMAND MODE)
Bit 2
0 NO COMMAND
1 CLOSE COMMAND
Bit 3
0 NO COMMAND
1 OPEN COMMAND
Bit 4
0 AUTO MODE (see §8.2 proportional control)
1 LOCAL CONTROL (ACTUATOR SELECTOR) INHIBITED
Bit 5 to 8 - NOT USED
Bit n° Value Description
Bit 1 to 8 0-255 0=0% (closed), 255=100% (open)