Spectrum Controls 1771sc-IFE32 User Manual

Page 32

22 PLC-5

32-Channel Analog Input Module

or block transfer read requests. It means that the module is alive but not yet config-
ured. Cleared after a valid BTW for configuration.

Out of range error occurred

This bit is set during normal run mode to indicate that at least one channel is out of
range. The diagnostic byte will be loaded with the channel ID of the last channel
detected as out-of-range (1=chan 1, 2=chan 2, etc.).

Invalid scaling detected

This bit is set during normal run mode to indicate that at least one channels scaling is
incorrectly defined. The diagnostic byte will be loaded with the channel ID of the last
channel detected with this error (1=chan 1, 2=chan 2, etc.).

Real time sampling BTR timeout

In the RTS mode a BTR request must be received within the time period defined for
RTS. If not, this flag is set.

Calibration Error

This bit is set while performing auto-calibrate. Does not clear if any calibration errors
occur.

EEPROM Error

At power up, the EEPROM is validated and the status is placed in this bit. If this bit
is a ‘1’, the EEPROM is invalid.

Hardware fault

If this bit is set a hardware fault was detected.

Configuration Error

If this bit is set an error was found in the configuration data. The diagnostic byte will
be loaded with the channel ID of the last channel detected with an error (1=chan 1,
2=chan 2, etc.). Otherwise, the diagnostic byte is zero.

Channel Faults

32 channel fault flags are provided to indicate hardware failure on a per channel basis.

Range Error Flags

32 channel overflow and 32 channel underflow flags are provided to indicate when
the input signal is out of range on a per channel basis. Out of range is defined as an
input signal sensed as approximately at or over/under the selected range endpoints.
These flags will be set at greater than +100% or less than -100% full scale data.

Channel Data

32 16 bit words are used to transfer data for all 32 channels to the PLC in a single
block transfer.

Real

Real Time Sampling:

Time Sampling:

Intervals for use by the processor. In the RTS mode the module scans and updates its
inputs at a user defined interval (DT). The module ignores block transfer read (BTR)