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Test Jacks
The sockets “A” and “B” can be used to measure the solenoid currents independently. The voltage is
approximately 1V at 1A. The analogue set point “S1.06” can be measured at the socket “SET”. The
signal is proportional to the measured value (1:2\half the set point voltage). At the socket “FB1”, the
actual analog feedback value (d10) can be measured. The reading is proportional 1:2 to the actual
value.
At the monitor socket “MON”, all display parameters are accessible as an analog voltage being
between 0-10V. The adjusted display parameter (dx.xx see also chapter Display Parameters) is
switched to the monitor socket “MON”.
Display Parameters
Internally calculated values can be displayed on the 4 digit display during normal operation and are
especially helpful during commissioning and troubleshooting. The values should be interpreted as
voltage or current with a standardized display resolution of 1 mV to 9.999 V for currents between
0
.
001A to 4
.
000A. The polarity signs are represented through the LEDs “+” and “-“. Available display
parameters are shown in Table 9.
Analog Output
Using parameter E01 (analog output), each of the display values d1.01 to d1.13 can be displayed as
an analogous voltage on contact 10b. This signal has a voltage of 0 to 10 V with12 bit resolution, and
for example, can control subsequent electronics. Parameter E18 can assign an output gain to the
output signal and therefore, adapt the output signal to the demands of subsequent electronics.
Comparator
Comparator function of digital controller and amplifier card ER9.3-10 is used in connection with the fail
safe function. If the lag error value (set value – actual value) is greater or less than the values set in
parameters C1.21 and C1.22 for longer than the time set in parameters C1.23 and C1.24, then the
comparator value is changing until it reaches the set parameter values. The comparator value can be
measured directly on pin 14b of the back socket. In connection with the break function, the fail safe
valve can be activated directly via the switching output (break output 20b, see chapter Break Function
on page 40).
Break Function
The break function on digital controller and amplifier card ER9.3-10 is used in connection with the fail
safe function. Depending on the value of the comparator function, the break output can directly drive a
fail safe valve (24V and 1A max). (Pin 20b).
Fail Safe Function
In the case of a disturbance, the fail safe valve tilts the swash plate on the pump to zero. The fail safe
function controls the lag error value (set value – actual value). If the lag error is greater or less than
the values set in parameters C1.21 and C1.22 for longer than the time set in parameters C1.23 and
C1.24, the fail safe function will de-energize the solenoid on the fail safe valve. Port A and B of the
servo cylinder will be connected and the pump tilts in zero position. For proper operation of the fail
safe function it is necessary to set the parameter E18 = 3. This is in accordance to the delivered
parameter value in Table 6. The electrical parameters of the fail safe valve are V = 24 V and
I
max
= 1 A. The proper fail safe valve can be ordered from Eaton Fluid Power GmbH, Wehrheim (order
number HC000000316951).
ATTENTION!
This is only an auxiliary function. For technical reasons, precise measured
values, comparable to a multimeter, are not possible.
