Bosch REXROTH VT-MRPA1-2X, Руководство пользователя, Страница: 27 / 36

Operation 27/36
RE 30220-B/05.2019, Valve amplifier VT-MRPA1, Bosch Rexroth AG
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.
Fault Remark
LED
(red/green)
ready
LED
(yellow)
“input”
LEDs (yellow)
“functions”
Solenoid
output
stages
Output
“ready”
Output at
test jack “v”
No error Permanently
on green Normal
indication Normal
indication Normal
operation Normal
operation Normal
operation
Operating voltage
UB too low UB < UBmin Permanently
on red Normal
indication Normal
indication Switched off Switched off 7 V
Operating voltage
UB too high UB > UBmax Flashing
green Normal
indication Normal
indication Normal
operation Normal
operation Normal
operation
Cable break,
command value
0..±10 V (Ucomm = 0 V) error
cannot be recognized;
behavior of the
output stages as with
command value = 0 V
(corresponds to 0 %) Permanently
on green Normal
indication Normal
indication Normal
operation Normal
operation Normal
operation
Cable break,
command value
+4..20 mA Icomm < 2 mA Permanently
on red Normal
indication Normal
indication Switched off Switched off 4 V
Overcurrent,
command value
-4..20 mA [1] Icomm > ca. 35 mA Permanently
on red Normal
indication Normal
indication Switched off Switched off 4 V
Solenoid cable
break Error is only
recognized when >
3.5 % Permanently
on red Normal
indication Normal
indication Normal
operation Switched off 5 V
Break of position
transducer cable Single wire
recognition Permanently
on red Normal
indication Normal
indication Switched off Switched off 6 V
Overcurrent
solenoid/output
stages E.g. short-circuited
solenoid Permanently
on red Normal
indication Normal
indication Switched off Switched off 8 V
Serious error Internal parameter
memory (EEPROM)
defective Permanently
on red Normal
indication Permanently
on (all 8) Switched off Switched off 9 V
Serious error Main controller does
not work Fast blinking
red & green Fast
blinking Fast blinking
(all 8) Switched off Switched off -14 V
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.