GE Grid Solutions Multilin 9450 - 9.9 Digital Status Input Module

CHAPTER 9: EXTERNAL I/O MODULES DIGITAL STATUS INPUT MODULE
EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 9–15
then replaced with the new value. Attempting to write a value greater than the
programmed Rollover Value for a given channel is completely ignored and no
registers are modified. If the difference is greater than half of the
programmed Rollover Value for a given channel, the write does not increment
the Residual but does update the Last Value. Overflow of the Residual is not
prevented.
2. The second process occurs in the main loop and attempts to decrement the
Residual by the Programmed Energy/Pulse Value. If the Residual is greater
than the Programmed Energy/Pulse Value and the Pending Pulses Value for
that channel has not reached the maximum limit, then Residual is
decremented appropriately and the Pending Pulses is incremented by two,
signifying two more transitions and one more pulse.
3. The third process runs from a timer which counts off pulse widths from the
Programmable Minimum Pulse Width Values. If there are Pulses Pending for a
channel and the delay has passed, then the Pulses Pending is decremented
for that channel and the Output Relay is toggled.
Operation Indicator (0000H = OK, 1000H = Problem):
Bit 1:1 = EEPROM Failure
Bit 2:1 = Checksum for Communications Settings bad
Bit 3:1 = Checksum for Programmable Settings bad
Bit 4:1 = 1 or mor Communications Settings are invalid
Bit 5:1 = 1 or more Programmable Settings are invalid
Bit 6:1 = 1 or more Programmable Settings have been modified
Bit 7:1 = Forced Default by Reset Value
Bit 15:1 = Normal Operation of the device is disabled
9.9 Digital Status Input Module
Digital Status Input Module Specifications
Model Number 8DI1
Communication RS485, Modbus RTU
Programmable Baud Rates: 4800, 9600, 19200, 38400, 57600
Power Requirement 15-20VDC @50-200mA; EPM 9450/EPM 9650 support up to four
modules
Operating Temperature (-20 to +70)
o
C/(-4 to +158)
o
F
Voltage Rating Up to 300VDC
Detection Wet/Dry, Auto-detect
Memory 256 Byte I
2
C EEPROM for storage of programmable settings and
non-volatile memory