Parameterization Of The Plc - Siemens SINUMERIK 840Di Manual

5 MPI Communication
5.7 Handheld terminal HT 6
5.7.3

Parameterization of the PLC

Program structure
5-164
The PLC program has a modular structure. It consists of the following function
blocks:
S
Runup and synchronization (OB 100)
S
Cyclic operation (OB 1)
S
Process alarm processing (OB 40).
The user (machine manufacturer) must call the relevant part of the basic
program in the OBs 1, 40 and 100, as shown in Fig. 5-16.
OB 100
Restart
Î Î Î
OB 1
Î Î Î
Cyclic
processing
Î Î Î Î Î Î Î
OB 40
Î Î Î Î Î
Process alarm
Î Î Î Î Î
Fig. 5-16 Structure of PLC program
FB 1
Start:
e.g. HHU
parameters
User program
FC 2
NCK
Mode grp.
GP-OB 1
Channel
Axis
Spindle
FC 14
MCP,
HHU
FC 6
TOOLMAN
FC 19/25/26
MCP:
MCP_IFM
User
MCP_IFT
program
HPU_MCP
FC 7/8/22
TM:
TM_Trans
TM_Dir
FC 17
Star/delta
FC 10
Error and
operational
messages
FC 3
G group
GP_PRAL
distributor
User
program
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03
FC (9/15/16/18)
ASUB,
con. axes/
spindles
FB 2/3/4
Read/ write
var., PI
services
FC 13
HHU:
Display control