BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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Ref
Addr.
Description
Data Type/Format
Holding Registers (4x References, Read/Write)
40041
40
(0028)
Input Reset DI
0-15
(Inputs Only)
Data Format:
16-bit Unsigned Integer
Inputs of the module may be
independently reset with this
command (does not reset the outputs
or controller). This is useful for
trouble-shooting. Writing FFFFH to
this register (all bits set) will trigger a
reset of the port.
FFFFH = Reset All Port Inputs
0000H = Do Not Reset Port.
40042
41
(0029)
Output Reset
DO 0-15
(Outputs Only)
Data Format:
16-bit Unsigned Integer
Outputs of the module may be
independently reset with this
command (does not reset the inputs
or controller). This is useful for
trouble-shooting. Writing FFFFH to
this register (all bits set) will trigger a
reset of the port
FFFFH = Reset All Port Inputs.
0000H = Do Not Reset Port.
40043
42
(002A)
Counter Start
Data Format:
16-bit Unsigned Integer
The lower byte of this 16-bit register
(bits 7-0) starts the counting of
counter channels 7-0 respectively.
This register will always read back as
FFFFH.
Bits 15-8: Not Used
Bit 7
: 0 = Don’t Start, 1 = Start
Bit 6
: 0 = Don’t Start, 1 = Start
Bit 5
: 0 = Don’t Start, 1 = Start
Bit 4
: 0 = Don’t Start, 1 = Start
Bit 3
: 0 = Don’t Start, 1 = Start
Bit 2
: 0 = Don’t Start, 1 = Start
Bit 1
: 0 = Don’t Start, 1 = Start
Bit 0
: 0 = Don’t Start, 1 = Start
Register Map
Model 989EN-4x16
Port Input and Output resets
are normally not required, but
are sometimes useful in
troubleshooting I/O and will
reset the input or output
circuitry independent of each
other, a power-on, system,
CPU, or communication
controller reset.
Resetting a port will turn all
outputs OFF and clear any
watchdog timeouts.
