Description
2.7 Digital input / output
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
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2.7
Digital input / output
Introduction
The SCALANCE W788-x/W748-x devices in the RJ-45 variant have a digital input/output.
The connection is made using a 4-pin terminal block. You will find information about the pin
assignment in the compact operating instructions of the devices.
Application example
●
Digital input to signal one item of information, for example "door open", "door closed".
●
Digital output, for example for "go to sleep" for devices on an automated guided transport
system.
Control of the digital output
Using CLI and using the private MIB variable snMspsDigitalOutputLevel, you can control the
digital output (DO/1L).
Note
You cannot configure the digital output with Web Based Management (WBM).
If the digital input changes the status, an entry is made in the event protocol table.
●
OID of the private MIB variable snMspsDigitalOutputLevel:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).siemens(4329).industria
lComProducts(20).iComPlatforms(1).simaticNet(1).snMsps(1).snMspsCommon(1).snMspsDi
gitalIO(39).snMspsDigitalIOObjects(1).snMspsDigitalOutputTable(3).snMspsDigitalOut
putEntry(1).snMspsDigitalOutputLevel(6)
●
values of the MIB variable
–
1: Digital output is open (DO and 1L are interrupted).
–
2: Digital output is closed (DO and 1L are jumpered).
