The number of the rack that the device is positioned in. Varies from 240 and up to 960 depending on the device. Increasing this number can improve request throughput only if the processor supports a higher PDU Size. Number of bytes to fit into PDU block of a single packet. The port to use when connecting to the device. The request timeout, specified in milliseconds. The hostname or IP address of the device. Disabling this setting terminates communication with the device. The description will appear on the Devices page on the Gateway. A DataType is not specified when accessing Counters.Ī description for the Device Connection.
#Siemens simatic s7 300 plc driver#
The driver automatically converts to/from BCD for you and exposes any counter tags as UInt16 values. CountersĬounters in the PLC are stored in BCD. A DataType is not specified when accessing Timers. When you write to a timer it is automatically converted from milliseconds into S5 time format for you. Timers are scaled up to a DWord and converted from S5 time format so they can represent the time in milliseconds without requiring any multipliers. Strings are assumed to be in the S7 string format and have a max length of 210. When addressing a Bit at a given offset, that offset is always treated as a Byte. bit to the end, where bit is in the range. Bitsīits are addressed by using the Bit DataType (X) and appending. To get 2 consecutive, non-overlapping words you need to address IW0 and IW2. It is important to note that offsets are absolute. Timer at offset 0 (No DataType is specified for Timers)Ĭounter at offset 0 (No DataType is specified for Counters) Tag addresses are made up of three different components: Area, DataType, and Offset.Ī String of length 50 starting at offset 24 in the Inputs areaīit 3 of the Byte at Offset 20 in the Inputs area
#Siemens simatic s7 300 plc plus#
You need a device name plus a tag address to create a tag. The device name is a known, but the tag address needs to be configured. Once you have both the device name and tag address you enter them in the in the OPC Item Path field of the Tag Editor window using the address format, where device_name is the name of the device and address is the configured tag address which is described here. Now you can see the Temp tag in the Tag Browser. The Configuring Siemens Addressing section below, explains how your can construct these addresses.
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The Status will show as Disconnected and then Connected. The Devices page is displayed showing the Siemens device is successfully created and added to Ignition.
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