Specifications

Synergy Nano Technical Manual, Revision -

Page 212

♦ Wait For: The Waitfor step holds program execution until the specified conditions are met. Those

conditions can be setpoints, a time interval or external digital inputs.

Waitfor steps can wait on one or more channels values. The Waitfor will not advance until the actual

value (temperature, humidity, etc) for that channel goes above or below the Waitfor value. The

direction the actual must travel is determined at the very start of the step. If the actual value is less

then the Waitfor value when the step begins, then the step will wait until the actual value is greater

then the Waitfor value. If the actual value is greater then the Waitfor value when the step begins, then

the step will wait for the actual value to be less then or equal to the Waitfor value.

Waitfor steps can also wait for a specified time. If the time in hours, minutes and seconds are

specified in the Waitfor step, then the controller will hold on the step for that time after all other

conditions are met. The timer will not start counting down until all of the specified channel values are

reached, and any specified digital inputs are reached. Once the conditions are met, the Waitfor time

will count down and then the controller will continue to the next step.

As mentioned above Waitfor steps can also wait for any of the controller’s sixteen digital inputs. Digital

inputs can be wired to the Synergy Nano to indicate one or more user states, such as a unit-under-test

power up during a test. The controller can be set to ignore the input (Don’t care), or to wait for the

input to be on or off (closed or open). Only digital inputs that are not ignored are checked. By default,

all inputs are ignored unless specified.

♦ Auto Start: The Auto Start step is used to automatically start the chamber. The profile can either

start in a relative time (i.e. ten hours and five minutes from when the program is started) or at an

absolute day and time (i.e. Tuesday, November 4th, 2003 at 7:30 AM). When you add an Auto Start

step to a profile you specify a relative or absolute time.

♦ Stop: The Stop step is used at the end of a profile to specify what to do at the end of a profile. The

chamber can either shut down and turn off all the outputs (the chamber will gradually return to ambient

conditions), or the chamber can go into steady state and run until manually stopped. If the chamber

returns to steady state mode, the last setpoints of the profile will be used as the steady state setpoints.

Synergy Manager can be used to create profiles for the Synergy Nano on your PC where they can be viewed

graphically, stored centrally and archived. Synergy Manager is Tidal Engineering’s PC application designed

to program, monitor and control multiple environmental test chambers. Synergy Manager can save profiles

in the Synergy Nano vpl format so they can be copied to and then run on the controller. The full version of

Synergy Manager can be used to transfer programs to the controller thru your network as well as thru GPIB

and RS-232 connections. See the Synergy Manager section

of this technical manual or the Synergy

Manager technical manual for more details. Synergy Manager is available for download from