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5.8 Status of the digital signals
The status of the digital signals can be read in decimal coding via the parameters
Digi-
tal inputs
250 and Digital outputs 254. The display of the di
ital input si
nals enables
checking the various control signals and their connections with the software functions
in question, in particular in commissioning.
After conversion of the decimal fi
ure into the binary system, bits 8, 9 and 10 displa
the states of the inputs EM-S1IND, EM-S2IND and EM-S3IND.
Coding of the status of the digital signals
8
7
6
5 4
3
2
0
Bit
15
14
13
12 11
10
9
Bit
control signal 2
( 2)decimal value
1
control signal 1
( 1)decimal value
control signal 3
(4)decimal value
control signal 5
( 16)decimal value
control signal 4
( 8)decimal value
control signal 6
( 32)decimal value
control signal 7
( 64)decimal value
control signal 8
( 128)decimal value
control signal 15
( 16384)decimal value
control signal 16
(decimal value 32768)
control signal 14
( 8192)decimal value
control signal 12
( 2048)decimal value
control signal 13
( 4096)decimal value
control signal 11
( 1024)decimal value
control signal 10
( 512)decimal value
control signal 9
( 256)decimal value
Example:
The actual value parameter
Digital inputs 250 displays the decimal value 640. Afte
conversion into the binary system, the following combination results:
1 0 0 0 0 0 0
BitBit
0
8
7
6
5 4
3
2
0151413
12 11
10
9
1
000000 01
Binary system:
control signal 8
(decimal value 128)
control signal 10
(decimal value 512)
The following status of the digital input signals of the EM-IO-02 expansion module has
been displayed
− Digital input EM-S1IND = 1 – control signal 8
− Digital input EM-S2IND = 0 – control signal 9
− Digital input EM-S3IND = 1 – control signal 10
Note: The three digital inputs of the EM-IO-02 expansion module can be used
for the evaluation of a speed sensor via the parameter
Operation mode
Speed sensor 2
493. The control si
nals are set to the lo
ical value zero
as a function of the selected operation mode.
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