GSE 355 - 3.9.2 Pre-acts; 3.9.3 Start Discharge; 3.9.3.1 Activation Method; 3.9.4 Discharge Example

AWT35‐500349|June2009 Page20
3.9.2 Pre-acts
Pre-act 1 is used for dual-speed dispensing. Pre-act 1 specifies when the system should switch from fast-
discharge to slow-discharge. When using a single-speed device, pre-act 1 should be set to 0 from the Setup
Mode. Pre-act 2 specifies the point where the final cutoff should occur, regardless of a single-speed or dual-
speed operation.
3.9.3 Start Discharge
3.9.3.1 Activation Method
The dispensing activation is limited to # or a remote key input. The deactivation of the setpoints is
automatic. The desired target may be based on net or quantity (if counting is enabled).
The discharge begins with the selected activation method. The method is determined by the parameters in
the setup mode.
The deactivation of the setpoints is automatic. The desired target may be based on net or quantity (if
counting is enabled).
Activation types
• Tare key – Press the
# key to start the process. A tare weight will be set and the weight will switch
to net zero.
• Remote key – Press the remote key switch.
3.9.3.2 Annunciators
3.9.4 Discharge Example
With a system set up to dispense ball bearings from a 50,000 lb weigh-bin and the fast-feed requiring an
early cutoff to slow-feed, the following settings might be used to achieve accurate dispensing of 1000
bearings:
Parameter Setting Actual Cutoff Value Comments
Targ 1 = 1000 0 – 1000 = (-1000)
Desired quantity (decreasing value from a net zero:
enter as a positive value).
Based = Qty Targets are compared to quantity (P170 Enabled).
PA 1 = 200
1000 – 200 = 800
0 – 800 = (-800)
Switch to slow feed at –800 bearings (decreasing value
from a net zero: enter as a positive value).
Start = # Start discharge with #.
PA 2 = 15
1000 – 15 = 985
0 – 985 = (-985)
Final gate begins closing at 985 bearings. Delayed
closure brings final quantity to 1000 (decreasing value
from a net zero: enter as a positive value).
Discharge Status Annunciator Status Setpoint Status (Requires Setpoint Option Board)
Fast Discharge SP 1 & SP 2 Illuminated Relay 1 and 2 Contacts Closed
Slow (or Single-
Speed) Discharge
SP 1 Illuminated Relay 1 Contacts Closed
Fill Done or Pause SP 1 & 2 Off Relay 1 and 2 Contacts Open