Beckhoff KL3403 Series, Документация

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Access from the user program
KL3403 50 Version: 3.1.0
5.3 Reading the process data
Simple process image (compatibility mode)
Supported by all firmware versions.
In the simple process image, each process data word is assigned to a fixed channel and can only read
measured values of this channel!
Channel Control byte Associated process data word
1
Control byte 1 [
}
46] DataIN1 [
}
46]
2
Control byte 2 [ } 46] DataIN2 [ } 46]
3
Control byte 3 [
}
46] DataIN3 [
}
46]
If a process data index is entered into a control byte in process data mode, the process record is returned in
the associated process data word.
The process data indices are listed in chapter
Control and status bytes [ } 47] .
Examples for the simple process image
Reading the voltage (RMS value) of phases L1, L2 and L3
• Enter process data index [
}
47] 0x1 in control byte 1.
The voltage (rms value) of phase L1 is returned in process data word DataIN1.
• Enter process data index 0x1 in control byte 2.
The voltage (rms value) of phase L2 is returned in process data word DataIN2.
• Enter process data index 0x1 in control byte 3.
The voltage (rms value) of phase L3 is returned in process data word DataIN3.
Reading the voltage (RMS value) of phase L1, reading the active power of phase L2, and reading the
power factor of phase L3
• Enter process data index 0x1 in control byte 1.
The voltage (rms value) of phase L1 is returned in process data word DataIN1.
• Enter process data index 0x2 in control byte 2.
The effective power of phase L2 is returned in process data word DataIN2.
• Enter process data index 0x3 in control byte 3.
The power factor of phase L3 is returned in process data word DataIN3.
Flexible process image
Supported from firmware version [
}
9] 3G by the KL3403-0000, KL3403-0010, KL3403-0025 and
KL3403-0026.
Supported from firmware version 4F by the KL3403-0020 and KL3403-0022.
Supported from firmware version 4K by the KL3403-0333.
With the flexible process image, a process data word can read measured values from any channel.
The flexible process image is enabled/disabled with
KS2000 [ } 42] or bit R32.3 [ } 54] of the feature register.
Examples for the flexible process image
Reading current (RMS value), voltage (RMS value) and active power of phase L2
• Enter 0x10 in control byte 1 ( channel index [ } 47] 01
bin
, process data index [ } 47] 0000
bin
).
The current (RMS value) of phase L2 is returned in process data word DataIN1.
• Enter 0x11 in control byte 2 (channel index 01
bin
, process data index 0001
bin
).
The voltage (rms value) of phase L2 is returned in process data word DataIN2.