Siemens SINUMERIK 840Di Manual page 156

5 MPI Communication
5.6 Handheld unit (HHU)
Setting the MPI
parameters
(FB 1)
5-156
OB 100
Î Î Î Restart
OB 1
Î Î Î
Cyclic
Î Î Î Î Î Î Î
processing
OB 40
Process alarm
Î Î Î Î Î
Fig. 5-12 Structure of PLC program
The MPI parameters are set on the PLC side in function block FB 1. Since the
data transfer rate of the MPI bus with SINUMERIK 840Di is 1.5 Mbaud, the pa-
rameters have to be set as follows:
HHU: INT:= 2;
HHU MPI BOOL:= FALSE
Notice
To be able to use HHU on an automation system alternately or simultaneously
together with MCP/HT 6, the user (machine manufacturer) has to adapt the
PLC program accordingly.
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
// the HHU is operated on an MPI bus
// at 1.5 Mbaud
 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