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Error
No error
Operating
UB < UBmin
voltage UB too
low
Operating
UB > UBmax
voltage UB too
high
Cable break,
(Ucomm = 0 V)
command value
error cannot be
0..±10 V
recognized;
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 %
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-MSPA2-2X 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.
Table 13: Error evaluation
LED
Note
(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
Fast blinking
red & green
The "error" voltage is automatically output a at test jack "v" s 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briefly withdrawn from the module.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.
Operation | Valve amplifier VT-MSPA2-2X
LED
LEDs
(yellow)
(yellow)
"digital
"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
Permanently
indication
on (all 8)
Fast
Fast blinking
blinking
(all 8)
RE 30232-01-B, Edition 04.2020, Bosch Rexroth AG
Solenoid
Output
output
"ready"
stages
Normal
Normal
operation
operation
Switched
Switched off
off
Normal
Normal
operation
operation
Normal
Normal
operation
operation
Switched
Switched off
off
Switched
Switched off
off
Normal
Switched off
operation
Switched
Switched off
off
Switched
Switched off
off
Switched
Switched off
off
27 | 36
Output test
jack "v"
Normal
operation
7 V
Normal
operation
Normal
operation
4 V
4 V
6 V
(solenoid
B)
5 V
(solenoid
A)
8 V
9 V
-14 V
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