Set analogue filter
Command number: 144
Number of parameters: 2
Bytes sent by the GSV: 0
With Set analogue filter the cut-off frequency of the prefilter can be changed, if the
AutoFilt-Flag of the Special-Mode-Registers is =0, see Set/Get special Mode. This low
pass filter is before the AD-converter and it is able to improve the signal to noise ratio
both of the digital and the analogue output.
The Standard version has 3 limit frequencies:
1.
3,5Hz, 1.order; from 260Hz on: 2.order
2.
260Hz, 1. order; from 1,7kHz on: 2. order
3.
1,7kHz 1. order
The parameter (1. parameter: Highbyte, 2. parameter: Lowbyte) is twice the amount of the
desired cut-off frequency. The cut-off frequency closest to the parameters will be selected
and setted.
Value Range: 0x00.07..0x0D.FF
Possible error codes 0xA0,0x54,0x55,0x56,0x71
Get analogue filter
Command number: 145
Number of parameters: 0
Bytes sent by the GSV: 2
Get analogue filter delivers twice the amount of the cut-off frequency of the analogue
prefilter. Possible return-values in standard version are:
0x00.07: limitfrequency = 3,5 Hz
0x02.08: limitfrequency = 260 Hz
0x0D.48: limitfrequency = 1,7 kHz
Possible error codes 0xA0,0x91
Switch Blocking
Command number: 146
Number of parameters: 3
Bytes sent by the GSV: 0
With Switch Blocking the GSV-21 can be protected against unintentional changes of the
operation parameters. If the blocking status is enabled, every set and write commands will
be refused, the error-code for this case is 0x71. This status can be identified with Get
Mode (Bit 7, read only). Because the GSV commands consist of only one byte, there
could be an accidentally call of commands by the device connected to the serial port (PC,
SPS or other). This may happen because of using a wrong portnumber or a wrong
program and so on. The blocking status is controlled by two constant ASCII-strings as a
parameter for this command:
ME-Meßsysteme GmbH, Neuendorfstr. 18a, D-16761 Hennigsdorf
44
Phone 03302 78620 60, Fax 03302 78620 69,
,
www.me-systeme.de/en
Summary of Contents for GSV-2AS
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