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D101925 0412 - BLident® UHF
3-15
Start-up with the BLxx-2RFID-A and BLcompact RFID electronic modules
The control variables and the command selection of the following table ( Table 19: “ Control variables
and command selection” page 3-15 ) can be accessed via the Visualizations tab by selecting PLC_VISU
(see Figure 7: “PLC_VISU PIB visualization” page 3-18 ).
TXSTART 1 The send buffer for the 1st channel starts at position 1 of the
memory area. This is the first byte of array CH_0_TXREF:
CH_0_TXREF[1].
Due to the length of 200 bytes (TXBUFLEN) the memory area
CH_0_TXREF[1] to CH_0_TXREF[200] is available for the send data
(write data) of the 1st channel.
A 2nd channel could be assigned accordingly to the area
CH_0_TXREF[201] to CH_0_TXREF[400].
RXBUFLEN 200 This specifies that the receive buffer for the 1st channel (1st
instance) is assigned to a range of 200 bytes in CH_0_RXREF.
The array CH_0_RXREF defines the entire memory area for the
send data and comprises 1024 bytes.
CH_0_RXREF can be found in the Resources tab in the
“VarGlobe_PIB” global variables folder.
RXSTART 1 The receive buffer for the 1st channel starts at position 1 of the
memory area. This is the first byte of array CH_0_RXREF:
CH_0_RXREF[1].
Due to the length of 200 bytes (RXBUFLEN) the memory area
CH_0_RXREF[1] to CH_0_RXREF[200] is available for the receive
data (read data) of the 1st channel.
A 2nd channel could be assigned accordingly to the area
CH_0_RXREF[201] to CH_0_RXREF[400].
Table 19:
Control variables
and command
selection
Variable Meaning
EXECUTE Control variables to execute a command.
A rising edge on this variable executes the command. The rising edge is created
by setting the variable from false to true.
INIT A rising edge on this control variable executes the Initialization command.
The rising edge is created by setting the variable from “false” to “true”.
Table 18: (cont.)
Configuration
parameters
Variable Value here Meaning