Display Selection From The Plc - Siemens SINUMERIK 840D sl Commissioning Manual

Expanding the Operator Interface (BE1)
5 Configuring OP Hotkeys and PLC Keys
5.3.3

Display selection from the PLC

There is an interface between the PLC and HMI Embedded/HT6 for selecting the
displays. These PLC displays offer the same means of display and functions as for
the displays selected via the softkeys.
Rough description of the interface
The interface contains:
• The display number
• Control bits from PLC to HMI
• Control bits from HMI to PLC
As each NCU can be addressed by up to two HMI Embeddeds/HT6s at the same
time in systems with "several operator panel fronts and NCUs", this interface can
exist in duplicate.
References:
The interface is located in the operator panel front interface (DB19). The interface
requires a total of 8 bytes in DB19, 4 bytes for each HMI Embedded/HT6.
Location and structure of the interface
The interface between HMI Embedded/HT6 and the PLC uses the following data:
HMI1:
DB19.DBW28:
DB19.DBB30:
DB19.DBB31:
HMI2:
DB19.DBW28:
DB19.DBB80:
DB19.DBB81:
PLC byte:
Bit0
Bit1
HMI byte:
Bit0
Bit1
Bit2
Bit3
Bit4
Bit7
Two bytes are used for the display number to be transferred by the PLC, one byte
respectively (PLC byte and HMI byte) for coordinating the display selection.
BE1/5-130
SINUMERIK 840D sl/840D/840Di/810D HMI Installation and Start-Up Guide (IAM) – 08/2005 Edition
/FB/, B3 "Several Operator Panels and NCUs"
Display number
PLC control bits
Control bits HMI
Display number
PLC control bits
Control bits HMI
Display selection
Deselect screen
Display selection/deselection accepted
Display is selected/deselected
Display is selected
Display is deselected
Error, display selection not possible
Inactive bit
HMI, PLC byte
PLC, HMI byte
HMI, PLC byte
PLC, HMI byte
© Siemens AG, 2005. All rights reserved
08/2005