Vishay G4-DT, Техническое руководство, Страница: 137 / 174

G4 Multi Channel Force Instrument
7-45
Example 3: Set read window to read floating point data from Function Block 2 (registers
44050 to 44061). Note that the number of registers read is always 12.
1. Make sure that the previous command was not 250. Set command byte (00) to 0 if
previous command was 250.
2. Set start address (44050) in bytes 02 and 03.
See ‘7 Communication – Modbus protocol – General registers’.
3. Enter the command (250) in byte 00.
Byte Description Dec Hex
00 Command 250 FA
01 Number of registers to write
 
02 – 03 Start address 44050 AC 12
04 – 15 Write registers 1 – 6.
 
Example 4: Reset the ‘Program reset’ bit in ‘Instrument status’.
1. Make sure that the previous command was not 252.
2. Enter the command (252) in byte 00.
Byte Description Dec Hex
00 Command 252 FC
01 Number of registers to write
 
02 – 03 Start address
 
04 – 15 Write registers 1 – 6.
 
Example 5: Other commands like Start operation, Zeroing etc. See chapter ‘7
Communication – Modbus protocol – Command register’ for a list of available
commands.
1. Make sure that the previous command was not the desired command.
2. Enter the desired command in byte 00.
Byte Description Dec Hex
00 Command XXX XX
01 Number of registers to write
 
02 – 03 Start address
 
04 – 15 Write registers 1 – 6.
 
Note that a dash in Dec. or Hex columns above indicates that the value is unimportant
and not used for the function described.