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MX4428 MXP Engineering / Technical Manual Document: LT0273
Device Information and Programming
Page 3-38 24 March 2006 Issue 1.5
3.18 CP820 MANUAL CALL POINT
3.18.1 GENERAL
The CP820 Manual Call Point consists of a MIM800 mounted on a Break Glass Switch
assembly. The MIM800 is factory programmed with a different type-id to allow the CP820 to
be distinguished from a generic MIM800.
The normal response time to an input change of state is 0 – 5 seconds, as each device is
polled at 5 second intervals by the MXP. If faster operation is required, interrupt operation
can be enabled. Interrupt operation allows a change to be signalled by the device so that the
MXP detects the change immediately, rather than waiting for the next poll of the device.
The CP820 is made without an EOL resistor and no wiring fault monitoring is provided as all
the wiring is internal.
The CP820 device processing will not use AVF, even if it is enabled for the circuit the CP820
is allocated to.
3.18.2 MX4428 PROGRAMMING OPTIONS - CP820
The mode determines whether interrupt operation is enabled or not. A value of 0 (default)
means interrupt is disabled, while a value of 2 enables interrupt operation.
Parameter Description Default
0 No interrupt Mode
2 Interrupt
0
P0 Normal to alarm threshold 122
P1
P2
P3
P4
P5
P6