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5.12. Multiset, setpoint gradient
The Multiset function is enabled on the MODE configuration
submenu by selecting MUL.SP = On.
This function allows to set:
•
2 setpoints (M.SP1 and M.SP2) by using a digital input
with function F.in.x = SEL1.0 (for PID1) or SEL2.0 (for
PID2) or SE12.0 (for PID1 and PID2) or a configurable
faceplate key (but.1 for model 850, but.1 or but.2 or
but.3 for models 1650 and 1850) setting the option but.x
= SP.SEL on the HMI submenu.
•
4 setpoints (M.SP1, M.SP2, M.SP3 and M.SP4) by using
two digital inputs, one with function F.in.x = SEL1.0 (for
PID1) or SEL2.0 (for PID2) or SE12.0 (for PID1 and PID2)
and the other with function F.in.x = SEL1.1 (for PID1) or
SEL2.1 (for PID2) or SE12.1 (for PID1 and PID2).
The selection of M.SP1 and M.SP2 is shown on the display
via LED.
The setpoint gradient function is enabled on the PID
submenu by setting the GRAD.I (up gradient setpoint) and/
or GRAD.D (down gradient setpoint) parameters with a value
other than 0.
At start and at Automatic/Manual switching, the setpoint is
assumed equal to PV. With set gradient it reaches the Local/
Remote setpoint or the setpoint selected in case of Multiset
function.
5.13. Setpoint programmer
5.13.1. What is a program
A program is a set of steps, each having a number of
parameters, that let you control the value of a process or of
a device based on lapsed time, on specific conditions, and
on reference values saved in the controller or supplied to it
from the outside.
In its simplest form, a step has two parts, represented on the
graphs by two segments:
•
a (possible) ramp, i.e., a variable change in the setpoint
value time;
•
a hold, i.e., a time in which the process value is held
constant after it has reached the setpoint value.
Standard Programmer Mode
A program can have a maximum of 192 steps and up to 16
programs can be saved in the controller.
Each program is defined by the number of its first and last
step.
Simplified Programmer Mode
In this mode a program consists of a fixed number of steps
(maximum 16) and the instrument can store up to 12 pro-
grams of 16 steps each in memory.
80209C_MHW_850-1650-1850_01-2020_ENG_pag. 209
Each change of setpoint is subject to a gradient: GRAD.I. for
change from lower to higher setpoint, GRAD.D. for change
from higher to lower setpoint.
The setpoint gradient is inhibited at start when Self-Tuning
is enabled. The control setpoint reaches the set value with a
speed defined by the gradient.
active
setpoint
M.SP4
M.SP2
M.SP1
M.SP3
IN1
ON
IN2
(*) in case it is set to the setpoint gradient
A program can be selected from the keypad, digital input,
Logic Function Block or serial line.
The program can be controlled from the keys, digital inputs
(START/STOP, RESET, end program), serial line, or events
(output of Function Block).
Step
Step
Step
SV
1
2
3
The program can be run by one of the two programmers
(PROGRAMMER 1 or PROGRAMMER 2) (see paragraph
"5.13.3. Programmer functions" on page 212).
(*)
time
ON
time
ON
time
Step
Step
4
5
Time
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