Flintec LDU 69.1 - Manual (Page 22)

LDU 69.1 Technisches Handbuch, Rev. 12 January 2011 Page 22 of 28
8.7. Synchronized Output Commands – HW, GH
For systems requiring simultaneous sampling of data two commands are available:
8.7.1. HW Hold Weight
Issuing the HW command, which has no parameters, will latch the current net weight in a register for later
readout in all LDU’s in a common network regardless of their individual address.
Note: The LDU’s will not respond to the HW command on the interface lines – it would lead to bus contention
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
HW  No response Hold weight value in register
8.7.2. GH Get Hold Weight
Issuing the GH command, which has no parameters, will return the current hold weight in the format N+000100
from the currently addressed LDU.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
OP 1  OK Open device #1
GH  H+01.100 Hold weight value: 1,100 d
All other channels (LDU with other address) have to be requested one by one.