I/O Terminal /
MANUAL CONFIGURATION
R6: Diagnostic register –
The diagnostic register may contain additional diagnostic information.
In the case of serial interface terminals, for example, parity errors that have occurred during data
transfer are indicated.
R7: Command register
High-Byte_Write = function parameter
Low-Byte_Write = function number
High-Byte_Read = function result
Low-Byte_Read = function number
5.4.3 Type
Registers
R8 - R15 Registers in the terminal's internal ROM
The type and system parameters are programmed permanently by the manufacturer and can only
be read by the user but cannot be modified.
R8: Terminal type:
The terminal type in register R8 is needed to identify the terminal.
R9: Software version X.y
The software version can be read as an ASCII character string.
R10: Data length
R10 contains the number of multiplexed shift registers and their length in bits. The bus coupler
recognizes this structure.
R11: Signal channels
In comparison with R10, the number of logically existing channels is located here. For example,
one physically existing shift register may consist of several signal channels.
R12: Minimum data length
The respective byte contains the minimum data length of a channel to be transferred. If the MSB
is set, then the control/status byte is not necessarily needed for the function of the terminal and,
with appropriate configuration of the coupler, is not transferred to the control system. 3.2.1.1
R13: Data type register
Data Type Register
Description
0x00
Terminal with no valid data type
0x01 Byte
array
0x02
Structure 1 byte n bytes
0x03 Word
array
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