Emergency Mode; Faults; Accessories - ProMinent DULCO flex Control Original Operating Instructions

2.7 Emergency mode

2.8 Faults

2.9 Accessories

Supplementary operating instructions for Modbus RTU
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.
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".
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
red
(flashing)
yellow
green
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".
You can use our CAN accessories, below, for a
DULCO flex Control DFXa Modbus installation.
Cause
The Modbus does not function correctly.
The Modbus is currently sending or
receiving.
The Modbus PCB is supplied with
voltage.
31