BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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I/O Self Test Control
IMPORTANT:
External excitation
MUST
be provided to properly run the I/O
Self Test.
CAUTION:
If you have I/O wiring present, then you should disconnect this
wiring (except excitation) to avoid potential signal contention during the I/O
test, as this test controls the outputs to drive the input channels using
excitation. You must turn all outputs OFF and disable any tri-stated input
ports prior to test.
The I/O self-test feature of this page takes advantage of the separate input
and output channels of this device, and the built-in wetting current sources at
each input, to test I/O operation right up to the field screw without having to
do any wiring. This is a useful trouble-shooting aide if you are experiencing
problems. Make sure that all outputs are OFF and disconnect I/O port field
wiring to the unit. Then click the Start Self Test button to check I/O
operation. Note that this test still requires external excitation as I/O cannot
operate without excitation. This represents a true test of the I/O, as the input
comparator is tied directly to the output mosfet drain terminal of the channel.
Export Configuration Control
Enter the IP address of the destination unit you are trying to replicate this
configuration at. This unit must be already connected to the network. Refer
to Network Connections for examples of how to network connect units.
The export function is a real time-saver when commissioning multiple units
in similar fashion. Simply enter the IP address of the unit you wish to send
your I/O configuration to (it is assumed that you have already communicated
with it and setup its network parameters). Click the Export Configuration
button to transmit your I/O configuration. With reference to the Modbus
Memory Map for this device, this function sends the contents of all Holding
Registers (4xxxx registers), right up to the wink register, to the IP address
indicated (it does not send network configuration parameters which must be
preset via the web browser). The Export Status window will let you know if
the configuration was received correctly or not at the remote I/O station.
I/O Self Test Control Error Codes
Bit #:
Description of Error
Bit 0:
SPI Check
– SPI Communication error
Bit 1:
Reset Output command error
Bit 2:
Reset Input command error
Bit 3:
Open load current enable command error
Bit 4:
Output Short Fault Protection Disable command error
Bit 5:
Global Retry All command error
Bit 6:
Output Write Fault
0x5555
– Write outputs command error
Bit 7:
Input Read Fault
– Read inputs command error
Bit 8:
Write/Read mismatch
– Input did not read
0x5555
Bit 9:
Output Write Fault
0xAAAA
– Write outputs command error
Bit 10:
Input Read Fault
0xAAAA
– Read inputs command error
Bit 11:
Write/Read mismatch
– Input did not read
0xAAAA
Bit 12:
Output Write Fault (Walk 1)
– Write outputs command error
Bit 13:
Input Read Fault (Walk 1) - Read inputs command error
Bit 14:
Write/Read mismatch
– Input did not match output (any failure)
Bit 15:
Output Write Fault (Walk 0)
– Write outputs command error
WEB BROWSER
Utility Page
Floating I/O (i.e. inputs tri-
stated) may cause the I/O to
improperly read the OFF state,
as the input threshold is 4V
and inputs must be pulled
above this value in order to
register as OFF.
Excitation MUST be provided
to properly execute I/O Self
Test.
Do not use the self-test with
the inputs tri-stated and be
sure to turn all outputs OFF
prior to test.
The “Walk 1” Test will shift the
“off” state through all the
channels while the other
channels remain
“on”.
The
“Walk 0” Test will shift an
“on” state through all the
channels while the other
channels remain “off”.
