3-10
Chapter 3: Configuring the 1762sc-IF4OF4 for RSLogix 500
User’s Manual Pub. 0300247-01 Rev. D
will continue to convert analog data to the minimum “Low Limit”
value. Bit is automatically reset (0) by the module when the under-
range condition clears.
For input data types 0-20 mA, 0-10 V, and 0-5 V, the under- range
flag bits will be set when the data value is 0.
Outputs:
When set to 1, indicates the output word value set by the user is
below the “Low Range” value (depending on the data format). The
channel will output voltage or current (depending on the output
type) down to the “Low Limit” value.
O<×> = Over range flag bits: Applies to all input/output types.
Inputs:
When set to 1 indicates input signal is above the “High Range”
value. Module will continue to convert analog data to the maximum
“High Limit” value. Bit is automatically reset (0) by the module
when the over range condition clears.
Outputs:
When set to 1, indicates the output word value set by the user is
above the “High Range” value (determined by the format). The
channel will output voltage or current (depending on the output
type) up to the “High Limit” value.
LD<×> = Load Error: This applies only to output channels. If the channel is
configured for voltage, this bit indicates a short circuit. If configured
for current, an open circuit is indicated. The error bit is cleared (0) at
the time the condition is cleared.
OC<×> = Open Circuit: This bit is only valid for 1-5 V, 4-20 mA ranges. When
set to 1, an open circuit has been detected.
Inputs:
Open circuit detection is only available for input channels
configured for 4-20 mA current or 1-5 V voltage. The remainder of
the input ranges will float near 0 V or 0 mA when an open wire
condition occurs. For each input channel, the user is given the
option of reporting upscale or 0 (see configuration words). For 4-
mA range, an open wire condition will be set for any value less than
2.0 mA. For 1-5 V range, an open wire condition will be set for any
voltage below 0.5 V. Thermocouple ranges will display appropriate
temperatures for an input voltage near 0 V.
NOTE
A special case exists when channels 6 or 7 are configured to display CJC
temperature. If either channel is configured to display the CJC
temperature, the associated OC bit will indicate an open-circuit condition,
if one exists, for the CJC sensor itself.
Summary of Contents for 1762sc-IF4OF4
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Page 6: ...vi MicroLogix 1200 Analog Combo Module 4Ch IN 4Ch Out User s Manual Pub 0300247 01 Rev D...
Page 41: ...Appendix A Module Specifications A 7 User s Manual Pub 0300247 01 Rev D...
Page 42: ...A 8 Appendix A Module Specifications User s Manual Pub 0300247 01 Rev D...
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