User Data Areas; Communication Between Hmi Device And Controller; Permitted Data Types - Siemens SIMATIC HMI OP 73micro Operating Instructions Manual

4.4.3

User data areas

4.4.3.1

Communication between HMI device and controller

Communication principle
The HMI device and the S7–200 controller communicate using
● tags and
● user data areas
Tags
The controller and the HMI device exchange data using process values. During
configuration, tags are created pointing to addresses in the PLC. The HMI device reads the
value from the specified address and displays it. The operator can also make an input on the
HMI device that is then written to the address on the controller.
user data areas
In the case of the OP 73micro and TP 177micro, the user data area serves for transmitting
the date and time from the PLC to the HMI device.
User data areas are set up when you create the project in the project window in
WinCC flexible of the HMI device by selecting "Communication ▶ Connections" in the "Area
pointers" work area. Physically, the user data area is in the PLC.
4.4.3.2

Permitted data types

Permitted data types
The table below lists the data types you may use in the configuration of tags and area
pointers.
Table 4-1
Name
Tag
Input
Output
Flag
Timer
Counter
OP 73micro, TP 177micro (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
Permitted data types
Object
V
I
Q
M
T
C
Data type
CHAR, BYTE, INT, WORD, DINT, DWORD, REAL, BOOL,
STRINGCHAR
CHAR, BYTE, INT, WORD, DINT, DWORD, REAL, BOOL,
STRINGCHAR
CHAR, BYTE, INT, WORD, DINT, DWORD, REAL, BOOL,
STRINGCHAR
CHAR, BYTE, INT, WORD, DINT, DWORD, REAL, BOOL,
STRINGCHAR
Timer
INT
Mounting and connection
4.4 Communication with S7-200
63