1 from 16 at 60Hz interference frequency
6.4.5 Analog part - Parameterization
13Byte of parameter data are available for the configuration. Parameters of the analog
part may be set by means of the
AI5/AO2
submodule of the Siemens CPU during hard-
ware configuration.
By using the record set 1 of the SFC 55 "WR_PARM" you may alter the parameterization
in the module during runtime. The time needed until the new parameterization is valid can
last up to 2ms. During this time, the measuring value output is 7FFFFh.
The following table shows the structure of the parameter data:
Byte
Bit 7 ... Bit 0
Default
0
Temperature unit
n
Bit 2, 0: reserved
n
Bit 4, 3: Unit
00b = Celsius
01b = Fahrenheit
10b = Kelvin
n
Bit 7...5: reserved
00h
1
Integration time, Interference frequency suppression
00b = 2.5ms, 400Hz *
01b = 16.6ms, 60Hz
10b = 20.0ms, 50Hz
n
Bit 1, 0: Analog Input Channel 0
n
Bit 3, 2: Analog Input Channel 1
n
Bit 5, 4: Analog Input Channel 2
n
Bit 7, 6: Analog Input Channel 3
AAh
2
reserved
3
Measurement Analog Input Channel 0
n
Bit 3 ... 0: Measuring range
n
Bit 7 ... 4: Measuring type
Measurement range:
0h: deactivated
2h:Current 0...20mA
3h: Current 4...20mA
4h: C/-20mA
19h
4
Measurement Analog Input Channel 1
n
Bit 3 ... 0: Measuring range
n
Bit 7 ... 4: Measuring type
19h
*) Here the VIPA CPU uses internally the value 1.25ms respectively 800Hz.
Parameter data
Record set 1
VIPA System 300S
+
Deployment I/O periphery
Analog part > Analog part - Parameterization
HB140 | CPU-SC | 313-5BF23 | en | 19-01
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