RE 30232-01-B, Edition 04.2020, Bosch Rexroth AG
Operation |
Valve amplifier VT-MSPA2-2X
27 | 36
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
Error
Note
LED
(red/green)
ready
LED
(yellow)
“digital
input”
LEDs
(yellow)
“functions“
Solenoid
output
stages
Output
“ready”
Output 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 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
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briefly withdrawn from the module.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.
