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Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Allen-Bradley MicroLogix 1100
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Publication 1763-RM001C-EN-P - October 2009
Using the High-Speed Counter and Programmable Limit Switch 113
Accumulator (ACC)
The ACC (Accumulator) contains the number of counts detected by the
HSC sub-system. If either mode 0 or mode 1 is configured, the value of the
software accumulator is cleared (0) when a high preset is reached or
when an overflow condition is detected.
High Preset (HIP)
The HIP (High Preset) is the upper setpoint (in counts) that defines when
the HSC sub-system generates an interrupt. To load data into the high
preset, the control program must do one of the following:
Toggle (low to high) the Set Parameters (HSC:0/SP) control bit.
When the SP bit is toggled high, the data currently stored in the HSC
function file is transferred/loaded into the HSC sub-system.
Load new HSC parameters using the HSL instruction. See HSL -
High-Speed Counter Load on page 118.
The data loaded into the high preset must be less than or equal to the
data resident in the overflow (HSC:0.OVF) parameter or an HSC error is
generated.
Low Preset (LOP)
The LOP (Low Preset) is the lower setpoint (in counts) that defines when
the HSC sub-system generates an interrupt. To load data into the low
preset, the control program must do one of the following:
Toggle (low to high) the Set Parameters (HSC:0/SP) control bit.
When the SP bit is toggled high, the data currently stored in the HSC
function file is transferred/loaded into the HSC sub-system.
Description Address Data Format Type User Program Access
ACC - Accumulator HSC:0.ACC long word (32-bit INT) control read/write
Description Address Data Format Type User Program Access
HIP - High Preset HSC:0.HIP long word (32-bit INT) control read/write
Description Address Data Format Type User Program Access
LOP - Low Preset HSC:0.LOP long word (32-bit INT) control read/write
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Allen-Bradley MicroLogix 1100 Specifications

General IconGeneral
Processor32-bit
Programming SoftwareRSLogix 500
MountingDIN rail or panel mount
Power Supply24V DC
TypeCompact PLC
Digital Inputs12
Digital Outputs8
Analog Inputs4 (depending on model)
Analog OutputsOptional with expansion module
Programming LanguageLadder Logic
Operating Temperature0 to 55 °C (32 to 131 °F)
SeriesMicroLogix

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