Acromag Bus Works 900EN Series, User Manual

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BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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44
Ref Addr. Description Data Type/Format
Input Registers (3x References, Read-Only)
30001 0000 Unit Status
Use this
register to
check for wink
mode, default
mode, or
watchdog
timeout.
Data Format: 16-bit Unsigned Integer
Bit 15:
NV Memory Fault
1 = Non-Volatile Memory failed
initialization
Bit 14:
Wink Mode Flag
1 = Wink (Blinks Run LED for ID)
(See Wink Unit Register)
Bit 13:
Default Mode Flag
1 = Default Mode Indication
Bits 12-1: 0 (Not Used)
Bit 0:
WD Fault (CH 00-15)
1 = Watchdog Fault
30002 1
(0001)
I/O Error
Status
Use this
register to
check for
output thermal
fault, output
over-voltage,
excitation
over-voltage,
open output
load, or input
thermal fault.
Data Format: 16-bit Unsigned Integer
This register reflects the fault status
for I/O channels 0-15.
Bit 15-3: 0 (Not Used)
Bit 2: Output
“Any Fault” flag including
thermal fault, excitation over-voltage,
open-load detected, and output over-
voltage.
Bit 1: Output over-voltage only flag
(drain-source or EXC over-voltage).
Bit 0: Input Thermal Fault Flag.
Note that only the faulted output(s)
will shut-down if a fault flag is set,
not the entire port. If excitation
over-voltage is tripped, all
channels are shutdown. Open-load
detection does not shut down the
output.
30003 2
(0002)
Input Change
Detect
(Latching) Data Format: 16-bit Unsigned Integer
The bit position corresponds to the
input channel number for the port. A
set bit (1) means the corresponding
channel of the port has changed
states. Reading this register will clear
all bits to 0. The lsb is channel 0.
30004 3
(0003)
CH 0 Input
Count High
Value (Most
Significant
Word)
Data Format: 16-bit Unsigned Integer
This registers reflects the upper word
count value of Channel 0.
Note that this register cannot be
changed directly. To preset a
count value use Holding Register
40015. This is only available on the
989EN-4016 model.
Register Map
Model 989EN-4x16
A drain-to-source voltage
greater than 50V, or an
excitation voltage between 28-
35V could trigger the output
over-voltage only flag (and the
“Any Fault” flag).
Note that if output fault fast
shutdown is selected, the
output error status flag may
not get set.
The error status flag is only set
while the output attempts to
drive the fault. The output will
shut down, then the error
status flag will clear as the part
cools. If auto-retry and/or
auto-refresh are enabled via
the Global Shutdown & Retry
Control register, the error
status flag may appear to be
intermittent while the fault
condition remains. This is
because the output
periodically retries its drive,
shuts-down, then recycles with
each retry.