Programming and running a sequence, Entering data for the states – VICI FTP User Manual
Page 11
7
Programming and Running a Sequence
Entering Data for the States
Heating and cooling sequences are controlled by states. State 1 is the idle-mode
(starting) temperature, with no ramp. States 2 to 8 are programmable by ramp rate,
end temperature, and hold time, for as long as the state is active. States are observed in
order, while any state indicated as inactive is skipped. States may be turned on and off
by electing the states active (Yes) or inactive (No). When the last active state hold time is
completed, the fan will cool the column to the state 1 temperature and hold idle until the
next “start” command.
Viewing the Current States
Enter the column heating state interface by typing SS<enter> (for “show states”). A new
unit may show these values:
State Active Rate Temp Time
1
Yes
0
0
0
2
Yes
0
0
0
3
No
0
0
0
4
No
0
0
0
5
No
0
0
0
6
No
0
0
0
7
No
0
0
0
8
No
0
0
0
Editing States to Create a Program
To make a change to a state, enter the command SS[n], where n is the number of the
state to be changed. Settings are changed by typing the new value after the colon, fol-
lowed by <enter>.
For an example, set up a program that starts with the column at 25°C, hold for
5 seconds (no ramp). The temperature will ramp to 100°C at 100°C/min and hold for
10 seconds, followed by a ramp to 200°C at 200°C/min, holding for 30 seconds. In a final
step, the column will ramp to 300°C at 200°C/min and hold for 25 seconds.
To set up the example:
1. Type SS1<enter> to bring up the following:
: ss1
Setpoint (0):
Hold time, seconds (0):
2. Enter the values for state 1 as below, then <enter>.
: ss1
Setpoint (0):25
Hold time, seconds (0):5
NOTE: The state 1 temperature setpoint must be at least 5°C above the column ambient
environment.