Bosch Rexroth VT-MSPA -2X Series - Device Operation; Device Operation and Error Handling

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Bosch Rexroth AG, Valve amplifier VT-MSPA, RE 30232-B/08.2020
9 Operation
Should a fault occur during operation, e.g. a power failure, the VT-MSPA...-2X can
simply be switched on again without further measures and it is then ready for
operation again.
If the VT-MSPA..-2X.. detects an error, a reaction takes place according to the table
below.
Error Remark
LED
(red/green)
ready
LED
(yellow)
“digital
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
Cable break,
solenoid
Error is only
recognized when >
3.5%
Permanently
on red
Normal
indication
Normal
indication
Normal
operation
Switched off 6 V
(solenoid B)
5 V
(solenoid A)
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
Table 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.