Max Machinery 121 INDICATOR - Manual (Page 17)

General Operation
121-000-350 © 2001 Max Machinery, Inc. Pg 17
Operation of RS-232 Serial Port with Printers:
Transaction Printing
For transaction printing, the user defines the items to be included in the printed document
(see section 6.3.20 SET DATA OUTPUT, Select_list). The transaction document can be initiated by pressing the
PRINT key or by a remote contact closure.
Data Logging
In data logging, the user defines the items to be included in each data log (see section 6.3.20 SET PRINTER
OUTPUT, Select_list). The user can also select when (time of day) or how often (print interval) the data log is to
be made (see section 6.3.19 SET PRINTER OUTPUT, Configure).
System Setup and Maintenance Report
The system setup and maintenance report lists all of the instrument setup parameters and usage for the current
instrument configuration. The audit trail information and a status report is also printed. This report is initiated in
the Test menu (see section 8.2.3 PRINT SYSTEM SETUP).
5.4 Batcher Operation
The Batcher mode is used primarily to control batches. The main difference between the Batch mode and
Rate/Total mode is the relay operation. The Batch mode allows the operator to "START" the unit via the front
panel or remote input. Once started, the relays (RLY1 & RLY2) will energize and send power to a flow control
device (i.e. solenoid valve or pump). The flow sensor will send a signal to the unit and total accumulation will
begin. When the Prewarn value (PRESET 2) is reached, Relay 2 will drop out (this is ideal for flow slow down).
When the Batch amount (PRESET 1) is reached,Relay 1 will drop out and the Batch is complete.
Several messages will be displayed during normal batch operation (i.e. Batch Fill, Batch Stopped). The keypad is
disabled for the duration of these timed messages (approx. 2 sec).
5.4.1 Batcher Configuration.
When the unit is programmed for batch mode, several batch operation choices are
available. These choices include: Up or Down Counting, Maximum Batch Preset, Batch
Overrun Compensation, Auto Batch Restart, Time Delay, Flow Signal Timeout, Maximum
Drain Time, Slow Start Quantity, Start or Reset/Start, and Stop or Stop/Reset.
Batch Count Mode
The Batch Count Mode allows the user to choose whether the unit will batch up to a
preset value or batch down from a preset value to zero.
Maximum Batch Preset
The Maximum Batch Preset allows the user to program the Maximum Batch value allowed to be entered by the
operator. If an operator should try to program a batch higher then this value, the unit will not allow the value to
be entered and will prompt the user with an error message saying that the Maximum Batch Preset has been
exceeded.
Batch Overrun
The Batch Overrun is used for batch applications that have slow responding valves and a consistent batching
flowrate. When the Batch Overrun is set, the unit will compensate for batch overruns by computing an averaged
overrun value from the last four batches. This average is used to internally adjust the batch setpoint to minimize
overrun.
Auto Batch Restart
The Auto Batch Restart function allows the user to set an amount of time to automatically restart a batch after the
completion of a batch (choose on or off).