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4
Function description
4.2
Communication with the control system
4- Kommunikation Steuerung BAWS
Communication with the control system
4200
Communication with the control system
4.2
ID sync
ID clock
ID o0
ID o1
ID i0
ID i1
IDsync
IDclock
IDo0, IDo1
IDi0, IDi1
(a)
The operating mode selector switch sets the "IDsync" signal, thereby signalling to the control system
that transmission is starting
(b)
A rising edge at the "IDclock" signal indicates that the data ("IDo0" and "IDo1") is present and valid and
is being read in by the control system.
(c)
The control system must output the data that was read in to lines "IDi0" and "IDi1" by the time there is
a falling edge at the "IDclock" signal.
(d)
With a rising edge at the "IDclock" signal, the operating mode selector switch reads the feedback from
the control system at IDi0 and IDi1 and checks it for equivalence.
(e)
Even at the end of the download, the control system must leave the data for at least 100 ms after the
last rising edge at the "IDclock" signal.
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
4-4
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
100 m s
T
B it
B it
B it
27
26
25
B it
B it
B it
13
12
11
B it
B it
B it
27
26
25
B it
B it
B it
13
12
11
(a)
(b) (c) (d)
Key:
- The "IDsync" signal indicates that the download has started
- The "IDsync" signal is present for 100 ms
- T = 100 ms
- Duty cycle = 50 %
- The "IDclock" signal is driven by the operating mode selector switch
- Data output;
these signal lines are used to download the Key ID number from the operating mode selec-
tor switch to the control system.
Bit 27 ... Bit 14 are sent via the data line IDo0.
Bit 13 ... Bit 0 are sent via the data line IDo1.
- Data input;
The control system uses these signal lines to confirm receipt of the previous Key ID number
(Bit 27 ... Bit 0) to the operating mode selector switch.
Bit 27 ... Bit 14 are received via the data line IDi0.
Bit 13 ... Bit 0 are received via the data line IDi1.
Download procedure:
B it
B it
B it 22 ... B it 16
24
23
B it
B it 9
B it 8 ... B it 2
10
B it
B it
B it 22 ... B it 16
24
23
B it
B it 9
B it 8 ... B it 2
10
100 m s
B it
B it
15
14
B it 1
B it 0
B it
B it
15
14
B it 1
B it 0
(e)
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