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10.7 Relay Functions

• Normally Open Contact –| |–

• Normally Closed Contact –|/|–

• Normally Open Coil –( )–

• Retentive SET Coil –(SM)–

• Retentive RESET Coil –(RM)–

• Negated Retentive Coil –(/M)–

• Negated Coil –(/)–

• Retentive Coil –(M)–

• SET Coil –(S)–

• RESET Coil –(R)–

• Positive Transition Coil –(↑)–

• Negative Transition Coil –(↓)–

• Vertical Link vert |

• Horizontal Link horz –

• Continuation Coil –––<+>

• Continuation Contact <+>–––

Each relay contact and coil has one input and one output. Together, they provide logic

flow through the contact or coil.

Input→ ——| |—— ← Output

10.7.1 Relay Functions Normally-open,

Normally-closed, Continuation Contacts

A contact is used to monitor the state of a reference. Whether the contact passes power

flow depends on the state or status of the reference being monitored and on the contact

type. A reference is ON if its state is 1; it is OFF if its state is 0.

Type of Contact Display Contact Passes Power to Right:

Normally Open -| |-

When reference is ON.

Normally Closed -|/|-

When reference is OFF.

Continuation Contact

<+>—

If the preceding continuation coil is set ON.

10.7.1.1 Normally Open Contact -| |-

A normally open contact acts as a switch that passes power flow if the associated

reference is ON (1).

10.7.1.2 Normally Closed Contact -|/|-

A normally closed contact acts as a switch that passes power flow if the associated

reference is OFF (0).

10.7.1.3 Example

The example shows a rung with 10 elements having nicknames from E1 to E10. Coil E10

is ON when reference E1, E2, E5, E6, and E9 are ON and references E3, E4, E7, and E8

are OFF.

174 GFK-1503E VersaMax PLC User Manual

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Brand	GE
Model	VersaMax PLC
Category	Controller
Language	English

GE VersaMax PLC User Manual

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GE VersaMax PLC Specifications

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