TR-Electronic CDV582 - B M P Access - Identification (PNU 974)

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11/21/2019 TR - ECE - BA - GB - 0139 - 02 Page 67 of 154
Procedure
-> Send the transfer value = 2 to PNU 972 -> measuring system acknowledges the write request
-> Send the transfer value = 1 to PNU 972 -> measuring system executes the device RESET
After re-establishment of the connection, read back PNU 972:
-> PNU 972 = 0: Device RESET was successfully executed
-> PNU 972 = 2: Device RESET write request has been lost, repeat the procedure
-> PNU 972 = 20: Illegal transfer value was written
However, the transfer value 100 must be sent to PNU 972, if a parameter is to be activated without a
device RESET.
PNU
972
Meaning
Device RESET / Parameter activation
Data type
Unsigned16
Access
read/write
Activation
with write access
Default value
0x0000
Permitted values
0x0002: Prepare devcice RESET
0x0001: Execute device RESET
0x0064: Activate parameter
6.2.4.7.9 B M P Access – Identification (PNU 974)
This parameter contains information about the Base-Mode-Parameter access points. Also see
Chapter 6.2.4 on Page 53.
PNU
974
Meaning
Base-Mode-Parameter-Access – Identification
Data type
Array [n] Unsigned16
Access
read
Subindex
Meaning
0
Max. block length: 0x00F0 = 240 bytes
1
Multiparameter access: 0x0001 = no multiparameter access
2
Max. latency: 0x0000 = unspecified