GSE Scale Systems - 221
Chapter 21 Setpoints Setup (FEATURE) Technical Reference Manual
Chapter 21 Setpoints Setup
(FEATURE)
21.1 Setpoint Parameters and Operations
Included as a standard feature in the model 574 are 32
Setpoints. All of these setpoints are software setups.
There are no hardware outputs available on the 574.
However, with the custom serial output setup it is
possible to serially control a remote setpoint device.
All of the setpoints can be configured to trigger certain
events such as print, tare, accumulate, zero, etc., when
the setpoint activates, deactivates or both. This is
accomplished through the use of the Macros. In this
way, many applications can make use of setpoints
without actually having a relay or logic output connected
to anything. Refer to Chapter 16 for more details on
Macros.
Each of the setpoints has selections which specify the
conditions which activate (energize) or de-activate (de-
energize) them. For the simplest uses, the setpoint
would be set up such that the output would activate when
the GROSS Weight exceeds a certain value and de-
activate when the weight falls below that same value.
However, programmability allows the change of state of
the setpoint to be based on other factors:
- Any weight (Gross, Net, Tare, total, etc.)
- When the incrementable registers rise above or
fall below a value or fall between or outside of
two values.
- Upon a certain key press such as <TARE>,
<ZERO> or <PRINT>
- Upon the occurrence of motion.
- Other selections include a minimum on time
which effectively simulates a timer relay's
operation
The Setpoint Setup parameters are allocated storage
memory as needed. That is, if a setpoint is enabled, then
the setup for that setpoint is reserved 33 bytes of storage
space.
SETPOINT SETUP PARAMETERS
The Setpoint Setup parameters and their complete
available choices are listed later in this chapter. The
basic setup of each parameter and notes pertaining to
their use are discussed below. For the sake of brevity, the
listed parameter numbers are for Setpoint #1. However,
since the possible choices are the same for the other 31
setpoints, simply replace the first two digits in the
Parameter Number shown shown in Table 39, Setpoint
Numbers to determine the parameter number for any
specific setpoint number. The setpoint setups begin at
parameter P5100 (for Setpoint #1) and continue through
P8200 (for Setpoint #32). To reach any one of the
setpoint setups, enter the Setpoint Setup Mode number
and press <SELECT>. To set up Setpoint #1 press
<5100> <SELECT>. You will then be asked to enter
the program security code before changes can be made.
<23640> <ID> <ENTER>.
SETPOINT OPERATION
When a setpoint is inactive, only the conditions relating
to the activation of the setpoint are checked and reacted
to accordingly. Similarly, when a setpoint is active, only
the conditions relating to the de-activation of the setpoint
are checked and acted upon.
The status of each setpoint is checked and updated once
every 1/20th of a second (20 updates per second), with
several exceptions as listed below:
- After the execution of a command, the next
update may be delayed slightly.
- During continuous transmits, the transmission
may delay the setpoint update
- During the execution of a Macro, the setpoint
updates are put on hold except during the pause
(%P), idle (%I), or get input (%G) commands
within the macro, or if a motion delayed
command is executed during the Macro.
- During an over-load or under-load condition,
all enabled setpoints are de-activated
SECTION - 21.1
Important
Keep in mind that the instrument powers down or
enters the Setup Mode during operation or when an
overload or underload condition occurs, the setpoints
will become de-activated. This is of importance
when determining a setpoint installation in order to
insure safe conditions.
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