salmson SIE Serie Instalacion Y Puesta En Servicio página 72

English
Operating possibilities at the slave
pump
6.4.3 Operation during interruption of
communication
Slave pump behaviour
66
NOTE
"Readiness" means:
"Operation" means:
"Mains on" means:
• The contact must be made to each pump for individual run signals.
No further settings can be made on the slave except for "External off"
and "Block/release pump".
NOTE
If an individual motor is switched voltage-free in a double pump, the
integrated dual pump management is deactivated.
When communication is interrupted between two pump heads in dual
pump operation, both displays show the error code 'E052'. Both
pumps behave as single pumps for as long as the interruption lasts.
• Both modules report the malfunction via the ESM/SSM contact.
• The slave pump runs in emergency operation (manual control) mode
according to the emergency operation speed previously set on the
master (see menu items <5.6.2.0>). The factory setting for the emer-
gency operation speed is n = 1850/925 rpm for 2/4 pole.
• After acknowledging the fault display, the status display will be
shown on both pump displays for the duration of the communication
interruption. This resets the ESM/SSM contact at the same time.
• The slave pump display will show the symbol (
emergency operation).
• The (former) master pump continues to have control. The (former)
slave pump follows the emergency operation settings. Emergency
mode can only be exited by triggering the factory setting, eliminating
the interruption in communication or by switching the mains off/on.
NOTE
During communication interruptions, the (former) slave pump cannot
run in auto control, since the differential pressure sensor has switched
to the master. No changes can be made to the module when the slave
is running in emergency mode.
• After the end of the communication interruption, the pumps will
resume regular dual pump operation as before the malfunction.
Slave discontinues emergency operation:
• Factory settings restored
During a communication interruption on the (former) slave, if emer-
gency operation is discontinued because the factory settings have
been restored, the (former) slave will start up with the factory settings
of a single pump. It will then run in Δp-c mode at about half the max-
imum delivery head.
NOTE
In the absence of a sensor signal, the (former) slave will run at maxi-
mum speed. To prevent this, the (former) master's differential pres-
sure signal can be looped through. When the double pump is
operating normally, it is not affected by sensor signals pending on the
slave.
• Mains Off, Mains On
During a communication interruption on the (former) slave, if emer-
gency operation is discontinued due to mains off, mains on, the
(former) slave will start up with the latest emergency operation set-
tings received from the master.(for example, manual control mode at
a specific speed or off).
The pump could run, there is no fault.
Motor turning.
Mains voltage is present.
- Pump running in
Pompes Salmson 04/2012