22
CEO: Dr. Bernt Götz • Phone +493641/66880 • Fax +493641/668866 • www.piezosystem.com
8.7 Status register
The status register is a 16bit register, in which each bit describes a certain setting of the amplifier or
actuator. The decimal sum of all bits is the value of the status register, it can be requested by the
stat
command.
Bit
Description
0 (LSB)
0 = actuator not connected
1 = actuator connected
1,2
0, 0 (
=
̂
0) = actuator without position sensor
0, 1 (
=
̂
2) = strain gauge sensor
1, 0 (
=
̂
4) = capacitive sensor
3
0 = open loop mode
1 = closed loop mode
4
0 = low pass filter off
1 = low pass filter on
5
0 = notch filter off
1 = notch filter on
6
reserved
7
0 = signal processing inactive
1 = signal processing active
8
0 = amplifier channels not bridged (single current)
1 = amplifier channels bridged (double current)
9
unused
10
0 = OK
1 = temperature too high
11
0 = OK
1 = actuator error or incompatible actuator type
12
0 = OK
1 = hardware error
13
0 = OK
1 = I²C-error
14
0 = OK
1 = lower control value limit reached*
15
0 = OK
1 = upper control value limit reached*
* If it is impossible to reach the setpoint in CL mode within 0.5 s and by means of the admissible piezo
voltage a flag is set in the status register. This flag indicates too much load or a defect of the actuator.
If the lower control value limit is reached and the actual position is still larger than the setpoint, Bit 14 is
activated. If the upper control value limit is reached and the actual position is still smaller than the
setpoint, Bit 15 is activated. As soon as the desired position is reached or a new setpoint is given, the
flags will be cleared and the detection procedure starts again.
