Operation - Bosch REXROTH VT-MRPA1-2X Owner's Manual

Fault
No error
Operating voltage UB < UBmin
UB too low
Operating voltage UB > UBmax
UB too high
Cable break, (Ucomm = 0 V) error
command value cannot be recognized;
0..±10 V behavior of the
output stages as with
command value = 0 V
(corresponds to 0 %)
Cable break, Icomm < 2 mA
command value
+4..20 mA
Overcurrent, Icomm > ca. 35 mA
command value
-4..20 mA [1]
Solenoid cable Error is only
break recognized when >
3.5 %
Break of position Single wire
transducer cable recognition
Overcurrent E.g. short-circuited
solenoid/output solenoid
stages
Serious error Internal parameter
memory (EEPROM)
defective
Serious error Main controller does
not work

9 Operation

Should a fault occur during operation, e.g. a power failure, the VT-MRPA1-2X can
simply be switched on again without further measures and it is then ready for
operation again.
If the VT-MRPA1-2X.. detects an error, a reaction takes place according to the table
below.
LED
Remark (red/green)
ready
Permanently
on green
Permanently
on red
Flashing
green
Permanently
on green
Permanently
on red
Permanently
on red
Permanently
on red
Permanently
on red
Permanently
on red
Permanently
on red
Fast blinking
red & green
Tabelle 9: Error evaluation
The "error" voltage at test jack "v" is automatically output as long as the erroneous
state persists (= LED "ready" is permanently on red). When the above causes of
error are eliminated the amplifier module automatically resumes operation according
to its intended use.
[1] For resetting the overload protection circuit the command value has to be briefly
withdrawn from the module.
In the case of serious errors the module must be replaced.
LED LEDs (yellow)
(yellow) "functions"
"input"
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Normal
indication indication
Normal Permanently
indication on (all 8)
Fast Fast blinking
blinking (all 8)
RE 30220-B/05.2019, Valve amplifier VT-MRPA1, Bosch Rexroth AG
Operation
Solenoid
Output
output
"ready"
stages
Normal Normal
operation operation
Switched off Switched off
Normal Normal
operation operation
Normal Normal
operation operation
Switched off Switched off
Switched off Switched off
Normal Switched off
operation
Switched off Switched off
Switched off Switched off
Switched off Switched off
Switched off Switched off
27/36
Output at
test jack "v"
Normal
operation
7 V
Normal
operation
Normal
operation
4 V
4 V
5 V
6 V
8 V
9 V
-14 V