9/17/2020
Page 27 of 44
QNW TC 1 User’s Guide
on the older TC 125, TC 225 and TC 425 temperature controllers (i.e., they will not cause an [F1 ER 9
<<….>>] report – see command class 8).
Note: Except for [F1 PS ?] and [F1 PS R(+/-)], any probe related command issued when a probe is not
connected to the TC 1 will result in the warning response [F1 NOPROBE].
5.10. Temperature Ramping
[F1 RR S 0.50]
Sets the ramp rate to 0.50 °C/minute. This command also sets the ramp status to
’W’
/ waiting mode (see below). With the exception of 0 the ramp rate must be in the range 0.01 to 10;
otherwise an ER9 reply will be returned by the controller, the ramp rate will be set to the nearest allowed
value, and the controller will send a second response specifying the ramp rate that was set.
[F1 RR S 0]
or [F1 RR -]
Sets ramp status to
’-’
/off (but does not change the current ramp rate setting).
If either command is sent during a temperature ramp, the controller will then
drive at maximum to the last set target temperature.
[F1 RR +]
Set ramp status to
’W’
/ waiting mode.
In waiting mode the TC 1 is waiting for a new target temperature to be set (see
command class 5). When the TT command is received, if temperature control
is on (see command class 4) the controller begins ramping the temperature
from the current value to the new TT at the previously specified ramp rate. If
temperature control was off when the TT command is received, the ramping
process does not begin until it is turned on. In either case the ramping state is
’+’
/on until the ramp is completed or cancelled.
If this command is sent while a ramp is in progress, the ramp status will change to
’W’
/ waiting and the controller will drive at maximum to the last target
temperature set.
[F1 RR ?]
What is the current ramp rate setting? Depending on the R+/R- state as specified
below, the ramp status (
’W’
/waiting,
’+’
/on or
’-’
/off) may also be reported.
...[F1 RR 1.00]
Current ramp rate is 1.00 °C/minute.
...[F1 RR W]
Ramp status is waiting.
[F1 RR R-]
Turn off automatic reporting of the rate and ramp status when changed by
command or by use of the front panel.
[F1 RR R+]
Turn on automatic reporting of ramp changes. Automatic reports will be sent by
the controller when the ramp rate or status is changed by command.
The power on default setting is to not report the ramp rate or the ramp state when changed.
If you then send [F1 RR R+], only the ramp rate will be reported when changed.
If you then send [F1 RR R+], both the rate and the state will be reported when changed.
If you then send [F1 RR R
-
], neither the rate nor the state will be reported when changed (back
to the power on default setting).
Note that the [F1 RR ?] will always result in a ramp rate response. The ramp status response will
also be sent if it has been enabled as described above.
The following seven commands, are accepted by and work with the TC 1. They are provided mainly to
maintain compatibility with control software/firmware developed for use with the older TC 125/225/425
family of temperature controllers.
