Emerson SM-I/O 24V Protected, Руководство пользователя, Страница: 7 / 42

SM-I/O 24V Protected User Guide
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Issue Number: 2 www.controltechniques.com
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2.4 Solutions Module I/O
2.5 Digital I/O
All digital I/O complies with IEC 61131-2, clause 3.3.1 type 1, (i.e. >2mA @ +15Vdc).
For type 2 input, the user will need to add extra load externally.
Three terminals are dedicated digital inputs (4 with Commander SK); the functionality of
these inputs is as follows:
•
The logic state of the input is monitored by a RO parameter
• The logic state can be inverted
• The digital input can be programmed to any unprotected parameter. The destination
parameter value will always be either 0 or 1 depending on the state of the input.
Four terminals are programmable as either digital inputs or output terminals (3 with
Commander SK), the functionality of these terminals is as follows:
Input
• The logic state of each input is monitored by a RO parameter
• The logic state can be inverted
• The digital input can be programmed to any unprotected parameter. The destination
parameter value will always be either 0 or 1 depending on the state of the input
Output
• The logic state of each output is monitored by a RO parameter
• The logic state can be inverted
• The digital outputs can be sourced from any parameter.
In the case where an integer parameter is used as the source, the threshold of
the output switching between low and high states is 50% of the parameter’s
maximum.
E.g. Source parameter = Pr
18.11 (maximum = 32767)
50% of 32767 = 16383 (due to integer truncation)
Therefore, if
Pr 18.11
≥
16383 the output will be high
if Pr 18.11 < 16383 the output will be low
• The digital outputs can only source current
Solution Module I/O only operates in positive logic mode.
All I/O and relays are user programmable for function and signal processing.
All new source and destination routing only changes to new set up locations when the
drive is reset.
By default, the digital inputs/outputs on the Solutions Module are configured to operate
as inputs, except Digital I/O 4 which is configured as an output (input only for
Commander SK).
The logic state of a digital input will operate even without a destination parameter
programmed.
NOTE
NOTE
NOTE
NOTE
NOTE
Function Quantity
Digital inputs 3 (4 on Commander SK)
Function Quantity
Programmable digital inputs / outputs 4**