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Weightec 348 Manual

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3.1 SETPOINTS SEE FOR CONNECTIONS PAGE 24, 25
Number of setpoints : 4 , each with separate controls of weight values en execution commands,
reading and writing via the RS 232 full duplex communication
Operating functions : - send value - after sending value yes/no direct active
- read value - auto set zero before start setpoint(s)
- (re)start setpoint(s) - automatic step to next setpoint
- stop setpoint(s) - setpoint on hold after cut off
- anti pulse filter
- automatic inflight compensation
Overload setpoint : Setpoint 4 may be set as a overload control on the gross weight value,
even if the other setpoints are operating in net mode
Setpoint outputs : - per setpoint one opto-coupled output, 24 V, load max. 85 mA, not inductive,
the output is in conduction to the common (GND!) as long as the really
measured weight value is less than the setpoint value
- per setpoint a indicator led on the main print board of the 348:
Led off = setpoint active (output is conductive)
Led on = setpoint off (output is not conductive)
- per setpoint a status code (on/off) in the standard weight string,
at communication speed < 19k2 Bd some delay may occur in the
response time of this status. Therefore this code should not be used for
direct switching off of connected dosing equipment
Tare : = set zero over the complete weighing range
(see 3.2 on next page) In a “read” command to a setpoint may, next to the weight value, also a tare
command be given. This tare command will be executed, at starting the
setpoint, automatically after no motion control and before switching on the
setpoint output
Start setpoints : The setpoints may be set direct active at receiving a “read” command, but
also only after the special “run” command has been received.
Each separate setpoint can be stopped or started, but also combinations of
setpoints and with automatic step to next setpoints.
After cut off a setpoint can be programmed to set on hold and may started
again with a “run” command.
Course/ fine dosing : Send the required weight values for setpoint 1 and 2 with course and fine
(example) dosing values to the 348, together with the executive code (table 7) F (=
tare + step next + hold + not active). See “Command string setpoint”, page 32.
By sending a start command (table 8) ! R ! , first the reading will be set zero
after no motion control, after that setpoint output nr. 1 is opened (conducting).
At attainment of the setted 1
e
weight value, the 1
e
output is switched off and set
on hold. At the same moment the 2
e
setpoint output is switched on and after
attainment of the setted 2
e
weight value will this be switched off en on hold.
By re-sending the start code ! R ! the cycle will be repeated.
With start code ! R # both the setpoint are started together.
Manual 348-2 V 3.1 Page 10 01-06-2007
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