Weidmuller SAI Active Universal Pro Series, Manual

Page: 117 / 177

Commissioning the PROFIBUS-DP
Activates the channel diagnostics
Bit 0 set the channel diagnostic.
Bit 0 1 = activate channel-specific diagnostics
If this bit is set, after the device-related
diagnosis the channel-referred diagnosis
is inserted.
Bit 0 0 = deactivate channel-specific diagnos-
tics
Instead of the channel-referred diagno-
sis the status of the safety devices and
the DESINA status is also contained in
the device-related diagnosis (2 byte).
Activates the DESINA function
Bits 0 to 7 set the DESINA diagnostics of the con-
nections 1 to 8. The DESINA diagnostics functional-
ity is activated if the corresponding bit is set to 1.
If the DESINA diagnostic functionality is activated,
the connection at pin 4 acts as a DESINA diagnos-
tics input. The connection at pin 2 is then the switch
input to be monitored.
Bits 0 to 7 1 = DESINA functionality OFF
Bits 0 to 7 0 = DESINA functionality ON
Determines the function of the connection points
as input or output
By setting bits 0 to 7, the functionality of the eight
connections can be defined as either inputs or out-
puts.
Setting this bit to 0 activates the output.
Set to this status, short-circuits to earth and +24 V
DC will be recognised and reported in the diagnos-
tics.
Bits 0 to 7 1 = connection pin 2 is INPUT
Bits 0 to 7 0 = connection pin 2 is OUTPUT
Defines how the outputs react when there is a
bus malfunction
The entries for Bit 0 to Bit 7 determine for each out-
put if it enters a safe status or if it retains the last
status. If this bit is set to 0, the output retains the last
status that prevailed before the bus error occurred.
The safe status is defined with the following byte
(defining the behaviour of the outputs in event of a
bus malfunction).
Bits 0 to 7 1 = OUTPUT goes into safe status
Bits 0 to 7 0 = OUTPUT retains most recent
status
Definition of measurement range/output range
for analogue inputs/outputs
Two bits per configuration byte are associated with
one channel. Following table shows the valid
ranges:
Bits 1 to 0
Bits 3 to 2
Bits 5 to 4
Bits 7 to 6 00 = 0 to 10 Volt
01 = 0 to 20 mA
10 = -10 to 10 Volt
11 = 4 to 20 mA
Definition of sampling time for analogue inputs
Each byte defines the sampling time in milliseconds
for each of the 4 channels. Valid values are in the
range of 5 to 250 ms. Values are automatically
rounded to a multiple of 5.
Definition of safe state for analogue outputs
There is one byte witch determines, if the analogue
output goes to safe state or keeps the current value,
when an error occurs. The first 4 bits are associated
to one of the 4 output channels each. The safe state
is set with the second parameter, which is a word
value. If safe state is enabled for one output, this 16
bit (although only the lower 12 bits are used, both
upper bits must be zero) value is written to the ana-
logue output.
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