ProMinent DULCO flex Control Original Operating Instructions

Device monitoring is only performed if the Modbus is in an active
operating status. To do this, the Modbus master needs to cyclically
send queries to the slaves. If this does not happen - in the speci‐
fied time - the pump stops.
Process:
If queries from the master remain unanswered beyond a certain
time, the pump is stopped. An error message is generated and
transferred to the pump. As soon as queries are resent, the pump
automatically starts up - providing the parameters responsible for
the operation of the pump permit this.
2.7
Emergency mode
You can guard against a potential failure of the Modbus control in
the following way:
1. Set an auxiliary frequency on the pump that fits best your
process in emergency mode.
2. If emergency mode is required, run the pump using the
"external control" terminal on the auxiliary frequency - see
"Peristaltic metering pump DULCO flex Control,
DFXa" - "Installation, electrical".
2.8
Faults
The "Modbus RTU" status LEDs on the Modbus module display
the status of the Modbus connection / Modbus module:
Tab. 29: "Modbus RTU" status LEDs
Colour Cause
red
(flashing)
The Modbus does not function correctly.
yellow The Modbus is currently sending or
receiving.
green The Modbus PCB is supplied with
voltage.
The 3 LEDs on top of the pump indicate the operating and fault
statuses of the pump itself - see "Peristaltic metering pump
DULCO flex Control, DFXa".
2.9
Accessories
You can use our CAN accessories, below, for a
DULCO flex Control DFXa Modbus installation.
Supplementary operating instructions for Modbus RTU
31

ProMinent DULCO flex Control Specifications

General

Brand	ProMinent
Model	DULCO flex Control
Category	Water Pump
Language	English