Pilz PIT m4SEU, Руководство по эксплуатации

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Function description
Operating Manual PIT m4SEU
1004648-EN-02
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5.6.3.2 Evaluation of the Key ID number with handshake-controlled communication
IDsync
Bit 27 Bit 25 … Bit 02 Bit 01 Bit 00
IDdata
Bit 26
t
V
[b]
[c]
[d]
[f]
t
h
t
en
IDresponse
IDrequest
[e] [a]
t
a
t
IDend
200 ms
[g]
Fig.: Timing diagram for handshake-controlled signal download
Legend
To assign the terminal designations to the short descriptions, please note the table in
Handshake-controlled communication mode [ 33] .
IDsync Control line
The signal is generated by the PIT m4SEU.
"0" signal No transponder key is inserted or the transponder key that is inser-
ted is invalid. The controller cannot request the Key ID number.
"1" signal A valid transponder key is inserted and the controller can request
the Key ID number.
IDre-
sponse Handshake line (Response)
The signal is generated by the PIT m4SEU and indicates whether a data bit at
IDdata is valid/invalid.
"0" signal The data bit at IDdata is invalid and may not be evaluated.
"1" signal The data bit at IDdata is valid and may be evaluated.
IDdata Data line for downloading the Key ID number
The Key ID number (28 Bit) is generated by the PIT m4SEU. The download be-
gins with the MSB (Bit27 … Bit00).
IDreqest Handshake line (Request)
The signal is generated by the controller.
"0" signal No bit is requested at IDdata
"1" signal A new bit is requested at IDdata.
t
en
IDsync Enable Time (min. 0 ms)
t
v
Data Output Valid Time (max. 10 ms)
t
h
Data Output Hold Time (min. 0 ms)
t
a
Data Output Access Time (max. 10 ms)
t
IDend
End of Key ID Number Transfer (200 ms)
After the last falling edge at IDrequest, the PIT m4SEU still has a "1" signal at
output IDresponse for 200 ms. In this way, the end of the Key ID number and
therefore the end of the download (End of Key ID Number Transfer) is displayed.
This can be used for the plausibility check.