Lenze ETC Motion Control - Manual (Page 241)

Interface PLC <˘> NC operating system
Definitions
5
5.1
l
241 EDSTCXN EN 2.0
With "Strobe", the transmitter validates the previously written data, with
"Acknowledgement", the receiver indicates the evaluation of the data. If the
transmitter detects the acknowledgement of the receiver, it withdraws the
"Strobe" signal, after which the receiver deletes its "Acknowledgement"
signal. It is now permitted to transfer new data. For the data transfer, no spe-
cial temporal conditions must be observed, but make sure that the signals
occur in order described. The times of the "Strobe" and "Acknowledgement"
signals are monitored. They must not exceed a period of one second. If this
period is exceeded, an error message is output, which leads to the termina-
tion of the currently running DIN program.
In general, the data exchange for messages always follows the following
signal pattern:
Daten
Strobe
Quittung
neuer Wert
gültig Übernahme erkannt
neuen W ert übernommen nächster W ert erlaubt
2
5
0
3
6 7
4
1
ETCN058
0 Data
1 New value
2 Strobe
3 Valid
4 Acceptance detected
5 Acknowledgement
6 New value accepted
7 Next value detected
In the following description of the signals and data, the respective signal
type is defined as
ƒ static
ƒ message
ƒ strobe
ƒ acknowledgement
The designation of the data words is carried out according to the following
procedure:
Dxxx.yy
xxx = number of the data word in a data block (0 ... 255)
yy = bit number in a data word (0 ... 15)