BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
_________________________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:248-295-0880 Fax:248-624-9234 Email:
53
Ref
Addr.
Description
Data Type/Format
Holding Registers (4x References, Read/Write)
40034
33
(0021)
Timer Limit
Value
Def = FFFFH
Data Format:
16-bit Unsigned Integer
Set a timer limit time from 1 to 65535
milliseconds in 1 millisecond intervals.
This time represents the time to wait
for a valid count edge. When the
value is reached, Timer Value is set to
value in timer limit state
Note: Timer Limit Value is applied to
ALL channels with counters enabled.
40035
34
(0022)
Timer Limit
State
Def = 0000H
Data Format:
16-bit Unsigned Integer
The bits of this 16-bit register value
define the state that the timer value of
each counter will be programmed to
once the timer limit is reached. Bit 0
corresponds to channel 0 (lsb), bit 1
to channel 1, and so on.
Note: Timer Limit Value is applied to
ALL channels with counters enabled.
40036
35
(0023)
Reserved
Reserved
– Do Not Use
40037
36
(0024)
Reserved
Reserved
– Do Not Use
40038
37
(0025)
Wink Unit
Toggle
Register
Used to help
identify
network units.
Data Format:
16-bit Unsigned Integer
Write 21845 (5555H) to this register to
cause the unit to “wink” its green Run
LED in order to ID the unit. Write the
same value a second time to stop
“winking”. This register will always
read back as 0000H. Use the Unit
Status Register wink mode flag (bit
14) to determine the wink state.
40039
38
(0026)
Digital Inputs
0-15
Data Format:
16-bit Unsigned Integer
Bit field (Read Only)
– The 16 bits of
this field correspond to the states of
channels 0-15, with the bit position
corresponding to the input channel
number (lsb is channel 0). A clear bit
(0) is OFF, while a set bit (1) is ON.
40040
39
(0027)
Digital Outputs
0-15
Data Format:
16-bit Unsigned Integer
Bit field (Read/Write)
– The 16 bits of
this field correspond to channels 0-15.
The bit position corresponds to the
output channel number (lsb is ch. 0).
A clear bit (0) is OFF, while a set bit
(1) is ON.
Register Map
Model 989EN-4x16
Note: Shaded registers are
only available on the 989EN-
4016 industrial model.
