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3.4 Handheld unit
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Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
3.4.4 Example: Connecting the HHU to the SINUMERIK 840D
1. Make the electrical connections on the distribution box and HHU.
When the HHU supply is connected, the following message must appear on
the display: “Waiting for PLC V 04.01.01 F”,
in which F stands for node no. 15 (default setting).
2. Check that the HHU is capable of bus operation:
––––> “BMPI” must be printed on rating plate on rear of unit.
3. Make a permanent bus cable connection at the end of the bus
(wire up inside connector instead of detachable connection!)
Note bus settings: OPI (on NCU at X101)
MPI (on NCU at X122)
4. Deactivate the terminating resistors in the last bus connector
(terminating resistors are integrated in the HHU).
5. Set the DIP switches in the HHU:
S 1.3 ON ––––> OPI (1.5 Mbaud)
S 1.3 OFF –––> MPI (187.5 kbaud)
6. Parameterize FB 1:
HHU 0 = No HHU
1 = HHU on MPI
2 = HHU on OPI
BHGIn 1st input byte
BHGOut 1st output byte
–––> Byte n+0, bit 7 must be set continually to “1”
by the PLC!
BHGStatSend Status data word Send
BHGStatRec Status data word Receive
BHGInLen B#16#6
BHGOutLen B#16#14
BHGTimeout S5T#700MS
BHGCycl S5T#400MS
BHGRecGDNo 2
BHGRecGBZNo 2
BHGRecObjNo 1
BHGSendGDNo 2
BHGSendGBZNo 1
BHGSendObjNo 1
7. Check whether data from FB 1 are included in data view, otherwise update.
8. The Send / Rec data are preset in the HHU. No further parameters need to
be set. The data must be set as follows for checking purposes only:
BHGRecGDNo 2
BHGRecGBZNo 1
BHGRecObjNo 1
BHGSendGDNo 2
BHGSendGBZNo 2
BHGSendObjNo 1
9. For the purpose of integration in the PLC, the TOOL box contains a file
“HHU.exe” as a programming example.
10. For HHU on MPI (SW4.x):
BHG = 2 and
BHGMPI = TRUE
3 Settin
s, MPI / OPI
08.9712.98
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