Siemens SINUMERIK 840C - Manual (Page 209)

6 NC Machine Data (NC MD), NC Setting Data (NC SD) 09.95
6.2 General machine data (general data)
MD 312: Mixed I/O assignment for first mode group
MD 317: Mixed I/O assignment for sixth mode group
The first decimal place (units) defines the output byte of the module. Mixed I/O (1, 2) PLC 1-4.
The second decimal place (tens) defines the number of the mixed I/O module (counting from
left to right). Mixed I/O (1, 2) PLC 9.
After Power On or Reset all the outputs of the selected output byte are set to 1 (24 V).
If an emergency stop is triggered by a following axis/following spindle, the bits which are set to
1 in MD 588*/528* of the following axis/following spindle change to 0 in the mixed I/O.
(See description for these MDs).
On the Mixed I/O module, there is a switch that switches over the address coding betweeen
PAD (for NC) and DIP switch (PLC). In NC mode, this switch must be on ”PAD”.
Assignment of inputs of Mixed I/O module for retraction of
one mode group 1)
318 - 323
Default value Lower input limit Upper input limit Units
0 0 81, 94 1) 8 2) –
Active on
Power On
A signal can be read in via a mixed I/O module or CSB board to trigger a retraction. One input
byte is used for each mode group.
MD 318: Mixed I/O assignment for first mode group
MD 323: Mixed I/O assignment for sixth mode group
The first decimal place (units) defines the input byte of the module. Mixed I/O (1, 2) CSB 1,
PLC 1-4.
The second decimal place (tens) defines the number of the mixed I/O module. Mixed I/O (1, 2)
CSB 8, PLC 9.
Module identifier 8 stands for the CSB board (number of inputs is limited to 6: right-justified in
input byte).
Active: On Power On
Time for interpolator-controlled continuation 1 ) 324
Default value Lower input limit Upper input limit Units
0 0
1 000
16 000 (as from SW 4.4)
ms
Active on
at once
This MD defines for how much longer the parameterized axes are traversed by the interpolator
after Mode Group Stop has been recognized. Interpolator-controlled deceleration starts after
this time has elapsed (T1: see Section entitled ”Stop”).
Active: On Power On
Maximum time for interpolator-controlled deceleration 1 ) 325
Default value Lower input limit Upper input limit Units
0 0
1 000
16 000 (as from SW 4.4 )
ms
Active
at once
This MD defines for how much longer the parameterized axes are decelerated by the
interpolator after Mode Group Maximum has been recognized (Time T2: see Section entitled
”Stop”) before travel is continued with a speed setpoint zero injection and correction or
controlled follow-up (previous SW 3 ”Stop”).
Active: Power On
_______
1) As from SW 4
2) As from SW 5
6–24 © Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)