Siemens SINUMERIK 840C - Manual (Page 300)

09.95 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.1 General MD bits (general bits)
7 6 5 4 3 2 1 0
Bit No.
NC MD
5147
Protect
EPROM
cycles from
overwrit.
(as from
SW 4)
Do not
delete read
only
programs
Acknowl-
edge
message at
once
Pos.
acknow. of
end
messages
File transfer
Default value: All bits 0
Active: On POWER ON
Bit 3 Bit 3=1 The program to be read in is not read in, the cycle is still available for
processing. The cancel alarm 3240 ”Subroutine not read in” is output.
The program number concerned is output in the block number of the
alarm. Reading in via RS 232 C/file transfer is continued.
Bit 3=0 The program to be read in is read in and is available for processing.
Cancel alarm 3239 ”Cycle overwritten by subroutine” is output. The
program number concerned is output in the block number of the alarm.
Caution:
The alarm is not returned via the file transfer message sequence.
Bit 2 Do not delete read only programs. Is used in computer links.
Bit 2=0 A program is not deleted until it is released (end-of-program and Reset).
File transfer is suspended in the interim.
Bit 2=1 A read only program is not deleted.
Bit 1 Acknowledge message at once.
Is used in computer links. When this bit is set, the NC forwards a
request to the host computer before entering data in NC memory.
Bit 0 Positive acknowledgement of end message.
Is used in computer links.
When this bit is set, the NC responds to an incorrect message from the
host computer by sending a positive acknowledgement. When the NC
transmits an end message, it also expects a positive acknowledgement
from the host.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–115
SINUMERIK 840C (IA)