Phoenix Contact PSRmodular - Figure 5-23 GUARD-MONITORING (1 CH) Function Block; Figure 5-24 Time Diagram for Manual Reset (Left) and Monitored Reset (Right)

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Items and operators of the PSRmodular Software

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5.1.2.3 GUARD-MONITORING function block (1CH; device for movable guards)

The GUARD-MONITORING (1CH) function block monitors the status of the “I

N” input of a

movable guard (e.g., safety door). When the movable guard is open, the “O

UT” output is

logic “0”. Otherwise, the output is logic “1”.

Figure 5-23 GUARD-MONITORING (1CH) function block

Parameters

Manual Reset If this option is selected, a reset must be performed manually every time the function block

is activated. Otherwise, the activation of the output directly follows the state of the inputs.

Reset Type There are two types of reset: “Manual” or “Monitored”. If the “Manual” option is selected, only

the signal transition from “0” to “1” is checked. In the case of the “Monitored” option, the dou-

ble transition from “0” to “1” and back to “0” is checked.

Figure 5-24 Time diagram for “Manual” reset (left) and “Monitored” reset (right)

Output Test Enables the selection of clock signals that are to be connected to the switches of movable

guards. These additional diagnostics enable the detection of short circuits and cross-cir-

cuits between the cables. To activate these diagnostics, the clock signals must be config-

ured in the “Property” window of the relevant function block.

NOTE:

Inputs at a function block must always be used in ascending order.

Example: Input 1 and Input 2 are used for the function block, so Input 3 must be used for

the reset input.

MANUAL

RESET

OUTPUT

t = 250 ms

MONITORED

RESET

OUTPUT

t2 = 250 ms

5 s > t1 > 250 ms