Siemens SIMATIC SM 335, Руководство пользователя

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Data Exchange with the SM 335
3-4
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Configuration
The input values are located in bytes ModAdd (module start address) to Mo-
dAdd + 15. See the SIMATIC Programmable Logic Controller, S7-300 Module Data
Reference Manual for information about how to compute the module start address.
Table 3-1 lists the input values, their addresses, and their default values.
Table 3-1 SM 335 Input Values
Byte Content Value
0 High-order byte of the measuring value from measuring
channel CH0 7F
H
*) or ***)
1 Low-order byte of the measuring value from measuring
channel CH0 FF
H
*) or ***)
2 High-order byte of the measuring value from measuring
channel CH1 7F
H
*) or ***)
3 Low-order byte of the measuring value from measuring
channel CH1 FF
H
*) or ***)
4 High-order byte of the measuring value from measuring
channel CH2 7F
H
*) or ***)
5 Low-order byte of the measuring value from measuring
channel CH2 FF
H
*) or ***)
6 High-order byte of the measuring value from measuring
channel CH3 7F
H
*) or ***)
7 Low-order byte of the measuring value from measuring
channel CH3 FF
H
*) or ***)
8 Number of end-of-cycle interrupts, only for “Comparator”
and “Measuring Only” modes
Default = 1;
If end-of-cycle interrupts have been suppressed:
1 + number of suppressed end-of-cycle interrupts 00
H
*) or ***)
9 Comparator mode (on power-up) or Return code for
“Comparator” and “Measuring Only” modes. 00
H
*) or
01
H
*) or ***)
10 High-order byte of the sensor voltage (see Subsec-
tion 2.5.1) **)
11 Low-order byte of the sensor voltage (see Subsec-
tion 2.5.1) **)
12 Interval counter (see Section 4.5) 00
H
*) or ***)
13 Interval time values in bits 16 to 24 (see Section 4.5) FF
H
*) or ***)
14 Interval time values in bits 8 to 15 (see Section 4.5) FF
H
*) or ***)
15 Interval time values in bits 0 to 7 (see Section 4.5) FF
H
*) or ***)
*) Initial value
**) factory-set
***) current value
Analog values ( 0...7)
See Subsections 3.1.3 and 3.1.4 for information about how an analog value is rep-
resented in binary in the CPU and on which binary value corresponds to which
analog value.