Access from the user program
KL3311, KL3312, KL3314 and KL3302
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Version: 4.2
R0 to R7: Registers in the internal RAM of the terminal
The process variables can be used in addition to the actual process image. Their function is specific to the
terminal.
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R0 ADC raw value (X_m)
This register contains the ADC raw value of the connected element according to (equation 1.2) (where
0x0000 is approximately equal to -125 mV, 0x8000 approx. 0 V and 0xFFFF approx. 125 mV; this
means that gain and offset errors are included).
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R1 to R5: Reserved
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R6: Diagnostic register
◦ High byte: reserved
◦ Low byte: Status byte
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R7: Command register
High-Byte_Write = function parameter
Low-Byte_Write = function number
High-Byte_Read = function result
Low-Byte_Read = function number
R8 to R15: Registers in the internal ROM of the terminal
The type and system parameters are hard programmed by the manufacturer, and the user can read them
but cannot change them.
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R8: Terminal type
The terminal type in register R8 is needed to identify the terminal.
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R9: Software version (X.y)
The software version can be read as a string of ASCII characters.
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R10: Data length
R10 contains the number of multiplexed shift registers and their length in bits.
The Bus Coupler sees this structure.
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R11: Signal channels
Related to R10, this contains the number of channels that are logically present. Thus for example a
shift register that is physically present can perfectly well consist of several signal channels.
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R12: Minimum data length
The particular byte contains the minimum data length for a channel that is to be transferred. If the MSB
is set, the control and status byte is not necessarily required for the terminal function and is not
transferred to the control, if the Bus Coupler is configured accordingly.
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R13: Data type register
Data type register
Meaning
0x00
Terminal with no valid data type
0x01
Byte array
0x02
Structure 1 byte n bytes
0x03
Word array
0x04
Structure 1 byte n words
0x05
Double word array
0x06
Structure 1 byte n double words
0x07
Structure 1 byte 1 double word
0x08
Structure 1 byte 1 double word
0x11
Byte array with variable logical channel length
0x12
Structure 1 byte n bytes with variable logical channel length (e.g. 60xx)
0x13
Word array with variable logical channel length
0x14
Structure 1 byte n words with variable logical channel length
0x15
Double word array with variable logical channel length
0x16
Structure 1 byte n double words with variable logical channel length
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R14: reserved
