Flag Bytes - Cp 525 'M' Type; Description; Address Mapping; Value Conversion - Siemens SIMATIC TI505 Installation And Operation Manual

A.7 Flag Bytes — CP 525 'M' Type

Description

Address Mapping

Value Conversion

Reading and
Writing
A-8 Simatic S5 Memory Mapping
The S5 Flag Bytes memory, as accessed through a CP module, refers to
memory that is organized by 255 contiguous bytes of memory. The TT types
that map to this type of S5 memory are Packed Control Register (TT Type
08) and Unpacked Control Register (TT Type 05).
TI500/TI505 Control Register
Memory Address
Address = CCCC (hex)
When converting the value for Packed Control Registers, the most
significant bit (MSB) of the TI500/TI505 value corresponds to the least
significant bit (LSB) of the S5. When converting the value for the Unpacked
Control Registers, the byte on/off state of the TI500/TI505 corresponds to
the bit specified in the S5.
Contents of TI500/TI505
Packed Control Registers
0 1 2 3 4
First register bit accessed
Contents of TI500/TI505
Unpacked Control Registers
00's
Reading the CP 525 M memory with the TT types 05 and 08 is supported.
Writing to the CP 525 M memory with TT types 05 and 08 is not supported
due to the functionality of the CP module itself.
Byte Address:
Quotient of (CCCC / 8)
Bit Address:
Remainder of (CCCC / 8)
Contents of S5 Flag Bytes
5 6 7
0 Only register bit accessed
S5 UniLink Adapter Installation and Operation
S5 Flag Bytes Memory
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1
First flag bit accessed
0