model 2704 controller installation and operation handbook - Soliton

Digital Programmer
2704 Controller
6A. Chapter 6A DIGITAL PROGRAMMER
6A.1. WHAT IS THE DIGITAL PROGRAMMER?
The digital programmer provides a timed control of a single digital output. It may be used
during any segment of a Setpoint Programmer or it may be used independently of the
Setpoint Programmer.
A sequence of eight Off and On times may be set for the output and up to four Digital
Programs can be set. Figure 6-4 shows an example of a timed digital output program.
On
On 1 On 2 On 3 On 4 On 8
Off
Off 1 Off 2 Off 3 Off 8
Figure 6A-1: An Example of a Programmed Digital Output
Time
Step Time Description
On 1 1:00:00.0 On starting the sequence the output will be ON for 1 hour
Off 1 0:30:00.0 The output switches OFF for 30 minutes
On 2 0:05:00.0 The output switches ON for 5 minutes
Off 2 0:30:00.0 The output switches OFF for 30 minutes
On 3 1:00:00.0 The output switches ON for 1 hour
Off 3 0:25:00.0 The output switches OFF for 25 minutes
On 4 0:10:00.0 The output switches ON for 10 minutes
Off 4 0:00:00.0
On 5 0:00:00.0
Off 5 0:00:00.0 The step is omitted for any time set to zero
On 6 0:00:00.0
Off 7 0:00:00.0
On 8 1:10:00.0 The output switches ON for 1 hour 10 minutes
Off 8 0:40:00.0 The output switches OFF for 40 minutes and is then reset to the start
of the sequence
The sequence may be run by:
1. Setting the ‘Run/Hold’ parameter to On
2. From an external source such as a push-button switch wired to a digital input
3. In any segment of a setpoint program if it has been wired, for example, to a Programmer
User Value.
6A-2 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00