Siemens SINUMERIK 840C Installation Manual page 129

5 PLC Interface
5.1.3 Function blocks (FB, FX)
Note:
1. Make sure that no confusion with the SINUMERIK blocks is possible. The user must not
utilize a SINUMERIK standard block name, nor may he assign a SINUMERIK library
number to his user blocks.
2. In the range of FB 0...FB 199
FX 0...FX 99 SINUMERIK blocks have absolute priority.
If SINUMERIK blocks must be used at a later time that overlap user block numbers, the
user blocks must be given a new number.
3. The SINUMERIK 880 with PLC 135 WB has no basic program written in STEP 5 in the
way the SINUMERIK 850 has. The corresponding functions are implemented in the PLC
operating system.
For configuration of the machine control panel and the hand-held unit,
please refer to the documentation "SINUMERIK 840C, Interface Part 2:
Connection Conditions".
5–12
Machine control panel connection
© Siemens AG 1992 All Rights Reserved
10.94
6FC5197- AA60
SINUMERIK 840C (IA)