Balluff BIS M-4 045 0 07-S4 Series, Operating Manual

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52
9
Device Function
BIS M-4 _ _ IO-Link Device
Read/Write Device
When communication is initiated by the IO-Link master, transmission of the current process data
begins.
As long as no data carrier was detected after start-up of the device, the firmware version of the
device is displayed in the first two user bytes
(see chapter 9.4 "Protocol examples" on
page 53).
If a data carrier is detected, the configured "Reaction to Tag Present" is executed. If, for example,
display serial number is set here, the serial number of the currently detected data carrier is
displayed in index 01
hex
...08
hex
.
The bit strings of the output buffer can be used to control the device. For example, a device
restart can be triggered by setting the GR bit or a new job can be passed by setting the AV bit.
Furthermore, the write data can be passed to the device here.
The state of the device is displayed in the input buffer. Here, for example, the AF bit indicates an
error in the current job and the HF bit indicates that the head is currently switched off. In addi-
tion, the input buffer is used to pass read data and status codes. If no data carrier is present, the
most recent data is displayed in the input buffer. The deleted CP bit indicates that no data carrier
is in the field.
By means of this method, all functions of the read/write device can be used. This includes
– reading,
– writing,
– dynamic reading,
– dynamic writing,
– writing a constant value,
– initializing CRC16 on the data carrier.
Note
Note that a job is restricted to its maximum scope.
Maximum job quantity:
BIS M-4_ _-0_ _-001-… read/write device: 256 bytes
BIS M-4_ _-0_ _-401-… read/write device: 65536 bytes
If the volume of data to be processed exceeds the maximum job quantity, multiple
individual jobs must be started
Functions can only be executed if a data carrier is in the read/write range. If a command is to be
sent that is not to be executed until the next tag is encountered, the device must be configured
for dynamic mode (
see chapter „7 Configuring the Read/Write Device“ auf Seite 43) .
9.3 Protocol
sequence