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130
Standard Mode
Section 4-8
Start
Transfer recipe and data
set numbers to PLC
Recipe release flag
set ?
Set Data Set-Download-
Active-flag
Transfer dataset
to controller
transfer checksum
Reset Data Set-
Download-Active-flag
Reset recipe and data
set number
End
Request to
terminate by
operator ?
no
yes
no
yes
Fig. 13: Data transfer sequence to the controller
The sequence of a terminal-initiated data set transfer is recapitulated below in
chronological order.
The process is described from the point of view of the terminal:
1. Transfers the recipe number to the variable addresses reserved for recipe num-
bers.
2. Transfers the data set number to the variable address reserved for data set
numbers.
3. Waits until the data set transfer is released by the controller. For this process,
the controller must set the Data Download Release bit (DDF bit) in the Write
coordination byte to logical 1.
Until this happens, the transfer can be cancelled again by setting the system
variable DSDnloadBreak to 1. Once the transfer has been released by the
controller, it can not be cancelled again by resetting the Data Download Release
bit in the Write coordination byte.
Summary of Contents for NT15S
Page 1: ...Cat No V056 E1 1 Programmable Terminal NT4S NT15S NT18S OPERATION MANUAL ...
Page 2: ...ii ...
Page 3: ...iii NT4S NT15S NT18S Programmable Terminal Operation Manual Produced March 1999 ...
Page 4: ...iv ...
Page 6: ...vi ...
Page 14: ...xiv ...
Page 26: ...12 The Terminals of the NT Series Section 1 2 1 2 4 1 2 NT4S SF122B E 1 2 4 1 3 NT4S SF123B E ...
Page 37: ...23 The Terminals of the NT Series Section 1 4 1 4 1 3 NT4S SF123B E 1 4 1 4 NT15S SF121B E ...
Page 54: ...40 The Terminals of the NT Series Section 1 7 1 7 6 3 ASCII Character Set Table ...
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