Allen-Bradley MicroLogix 1400 Instruction Manual page 107

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Counting Enabled (CE)
Description Address
CE - Counting
Enabled
(1) For Mode descriptions, see HSC Mode (MOD) on page 116.
The CE (Counting Enabled) control bit is used to enable or disable the
High-Speed Counter. When set (1), counting is enabled, when clear (0,
default) counting is disabled. If this bit is disabled while the counter is
running, the accumulated value is held; if the bit is then set, counting
resumes.
This bit can be controlled by the user program and retains its value
through a power cycle. This bit must be set for the high-speed counter to
operate.
Set Parameters (SP)
Description
SP - Set
Parameters
(1) For Mode descriptions, see HSC Mode (MOD) on page 116.
The SP (Set Parameters) control bit is used to load new variables to the
HSC sub-system. When an OTE instruction with the address of HSC:0/SP
is solved true (off-to-on rung transition), all configuration variables
currently stored in the HSC function are checked and loaded into the HSC
sub-system. The HSC sub-system then operates based on those newly
loaded settings.
This bit is controlled by the user program and retains its value through a
power cycle. It is up to the user program to set and clear this bit. SP can
be toggled while the HSC is running and no counts are lost.
Using the High-Speed Counter and Programmable Limit Switch
Data Format HSC Modes
HSC:0/CE bit 0...9
Address Data Format HSC Modes
HSC:0/SP bit 0...9
(1) Type User Program Access
control read/write
(1) Type User Program Access
control read/write
Publication 1766-RM001A-EN-P - October 2008
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