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SR2MAN01 11/2007 41
Rules for Entering Ladder Diagrams
Description A smart relay allows you to enter 120 line Ladder diagrams.
The smart relay’s display screen is used to display these lines, 4 at a time, in the
following manner:
Each line comprises 5 fields each with 2 characters reserved for contacts
(conditions). The 4 central columns can also accept links. The last three-character
column is reserved for coils (actions).
Links must be entered between the contact and coil columns.
A ladder diagram is entered into the smart relay using the front panel keys (see
Control Keys on the Front Panel of the Smart Relay, p. 20).
Prompt Element
1 Column reserved for contacts (conditions).
2 Column reserved for contacts (conditions) and for links.
3 Column reserved for coils (actions).
4 Column reserved for links.
I1-H1-C1-M1-T2-CC1
I2
Z1 -----------
Z3
1
2
4
3