Commands. Hydac PB_HLT 1100 SAE J1939

HLT 1100 SAE J1939 17

4.5.2 Description of the configuration range "value"

The user data range "Value" of the configuration message will be defined using the data type of the OL (object list). The data type defines the number of used data bytes. The number is represented in "Little-Endian" which means the least significant data byte (LSB) will be located at the lowest address (byte 5).

Example: In a uint16 value, for example, only the first two bytes (byte 5 and byte 6) configuration message's value range are used and interpreted as unsigned 16 bit integer value.

Value

Datatype Bit uint8 uint16 uint32 bool8 string[4]

8

16

32

8

32

LSB: Least Significant Bit/Byte

MSB: Most Significant Bit/Byte x Byte is not used

(Byte 5)

LSB

LSB

LSB

LSB

[0]

(Byte 6) x

MSB

LSB+1 x

[1]

(Byte 7) x x

LSB+2 x

[2]

(Byte 8) x x

MSB x

[3]

E

4.6 Commands

Commands are a special function with the configuration They are handled via the PGN 61184 as well. In contrast to the general entries in the Object List (OL), writing on a control command index triggers a function in the device.

4.6.1 Start editing mode

Before the settings are written, the master must set the sensor to the editing mode. This is carried out by writing the string "edit" into the Index 101. In the editing mode, the sensor reacts exclusively to configuration commands. The editing mode can only be finished by restart.

Prior to restarting, the changes must explicitly be saved (Index 102).

If restart is carried out without saving, all changes will be lost!

Master

Index

(Byte 1)

101

Sensor

Index

(Byte 1)

101 r/w

(Byte 2)

1 r/w

(Byte 2)

1 dc

(Byte 3)

0 dc

(Byte 3)

0 ack

(Byte 4)

0 ack

(Byte 4)

0

(Byte 5)

Value (  "edit")

(Byte 6) (Byte 7)

0x65 "e" 0x64 "d" 0x69 " i

"

(Byte 5)

0

(Byte 6)

Value

(Byte 7)

0 0

(Byte 8)

0x74 "t"

(Byte 8)

0

Edition: 2021-08-20 HYDAC ELECTRONIC GMBH Part no.: 670069