Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) Algorithms, Tables and Sequential Logic Functions - Manual (Page 152)

Logic Functions - Book 2
CONFIGURING THE SEQUENCE BLOCK
11-6
Defining the Outputs
The number of outputs and their definitions are user configured for each sequence using the
Outputs menu. Outputs may be configured for different values in each step, but can only
assume one data type. Output data types and initial data are configured using the Specify
Output Data menu; output values for each step are assigned in the Step Definition menus.
One output may be assigned multiple values for different steps. For example, a single output
can be used to send new setpoint values to a PID block by configuring a floating point value in
one step and a different floating point value in another step. Outputs are set upon entry into
each step in a sequence, and remain unchanged for the duration of the step.
The sequence in this application example requires three outputs. The first two outputs
represent the digital states (open or closed) of the fill valve and drain valve. The third output is
a signal to the temperature controller to change its setpoint. Two different setpoint values
(250 and 100°F) can be sent to a PID block at different steps in the sequence using a single
output. Define the outputs using the instructions in Table 11-4.
Table 11-4. Output Definition Procedure
Step Procedure Comments
1 On the SEQ properties display, select the Outputs
menu.
2 Select Add and type the input name Fill_V.
3 Select the Data type field and make it Discrete.
4 Select the Initial data field and make it False. False can represent closed and True
can represent open.
5 Repeat Steps 2 through 4 for the following inputs using
the assigned input names, type and values:
Drain_V Discrete False
SP Floating Point 100