Control Functions Comment; Control Functions Drum Sequencer - GE VersaMax PLC User Manual

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Input/ Output
enable
Step
144 GFK-1503E
For public disclosure
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10.2.6 Control Functions Comment

The Comment function is used to enter a comment (rung explanation) in the program. A
comment can have up to 2048 characters of text. Longer text can be included in printouts
using an annotation text file.
It is represented in the ladder logic like this:
(* COMMENT *)

10.2.7 Control Functions Drum Sequencer

The Drum Sequencer function is a program instruction that operates like a mechanical
drum sequencer. The Drum Sequencer steps through a set of potential output bit patterns
and selects one based on inputs to the function block. The selected value is copied to a
group of 16 discrete output references.
Enable
Step
Reset
Pattern
Dwell Time
Fault Timeout
Power flow to the Enable input causes the Drum Sequencer to copy the content of a
selected reference to the Out reference.
Power flow to the Reset input or to the Step input selects the reference to be copied.
The Control Block input is the beginning reference for the Drum Sequencer function's
parameter block, which includes information used by the function.
10.2.7.1 Parameters of the Drum Sequencer Function
Choices
The Enable input controls execution of the function.
flow
The Step input can be used to go one step forward in the sequence.
When the Enable input receives power flow and the Step input makes
flow
an Off to On transition, the Drum Sequencer moves one step. When
Reset is active, the function ignores the Step input.
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OK
Out
Drum Coil
Dwell Timeout
Timeout Fault
First Follower
Description
VersaMax PLC User Manual
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