LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 41 of 45
8.12. Trigger Commands
– SD, MT, GA, TE, TR, TL, SA
Note:
All changes to the trigger commands have to be stored in the EEPROM using the WP command. See
chapter 8.11.2.
8.12.1. SD Start Delay Time
[ SDO 2100 sub 0E ]
This command defines a time delay between the trigger and the start of the measurement.
Setting range: 0 ms to 65535 ms.
Master (PC / SPS) sends
Slave (LDU 179.1) responds
Meaning
SD
S+00100
Request: SD = 100 ms
SD200
OK
Setup: SD = 200 ms
Default setting: SD = 0 ms; time plot of a typical checkweigher cycle see below
8.12.2. MT Measuring Time
[ SDO 2100 sub 08 ]
This command defines the measuring time for the averaged measurement result.
Setting range: 0 ms to 3000 ms.
Master (PC / SPS) sends
Slave (179.1) responds
Meaning
MT
M+00100
Request: MT = 100 ms
MT500
OK
Setup: MT = 500 ms
Note:
The setting MT = 0 disables the trigger function and the averaging.
Default setting: MT = 0 [= trigger function disabled]; time plot of a typical checkweigher cycle see below
8.12.3. GA Get Triggered Average Value
[ SDO 2900 sub 06 ]
This command reads the measurement result of a measurement cycle. The measurement value has been
averaged according the defined measuring time.
Master (PC / SPS) sends
Slave (LDU 179.1) responds
Meaning
GA
A+001.100
Request: GA = 1100 g
Note:
For preventing errors during the read out of the data the register GA has stored the value 999999 at the
beginning of the measurement cycle. The measurement result can only be read after the defined measuring
time MT has been elapsed and before a new measurement cycle has been started.
8.12.4. TE Trigger Edge
[ SDO 2500 sub 02 ]
This command defines the trigger edge. Allowed settings are “0” for falling edge and “1” for rising edge. This
command can only be used in conjunction with a hardware trigger on the digital input channel 0.
Master (PC / SPS) sends
Slave (LDU 179.1) responds
Meaning
TE
E:001
Request: TE = 1 (rising edge)
TE0
OK
Setup: TE = 0 (falling edge)
Default setting: TE = 0 [= falling edge]; time plot of a typical checkweigher cycle see next page.
