LaserSpeed 8000/9000 I/O Module Instruction Handbook
Operation
Part No. 93342 / Drawing No. 0921-01516
Page 63 of 84
Revision E (Dec 2013)
To send configuration parameters to the LS9000/LS8000:
1) The Profibus Master sets all the configuration parameters in the DP
Slave
2)
The Master sets Bit 0 of the Status & Command byte to a “1”. PUV = 1
3) The I/O Module sends all the configuration parameters to the
LaserSpeed gauge.
4) The I/O Module sets Masters PUV to 1.
5) Master detects PUV set to 1 and sets the I/O Module PUV to 0.
6) The PUV status Bit 1 is cleared in the PUV byte when the configuration
parameters have been updated in the gauge. Wait until Master PUV =
0.
The least significant 2 bits (LS-nibble) of the PUV Command Status Byte
determine the mode of operation of the I/O Module. The Fieldbus Master may
change any of the user bytes. A bit in the PUV signals when the data has
changed. A simple handshake scheme between the Fieldbus Master and the I/O
Module accomplish the configuration.
The Master writes appropriate data into the Output Data Block and then sets the
LS-nibble of its PUV Command Status to 0x01 (hexadecimal value) to begin the
initialization process. The I/O Module reads the PUV value every 100
milliseconds and begins a configuration sequence when the PUV = 0x01. The
I/O Module uses the data then writes 0x01 back to the Master’s PUV to signal the
transfer. The Master sets the PUV to 0x00. The configuration sequence ends with
the I/O Module setting its corresponding PUV Command Status byte to 0x00. The
Master reads this value as acknowledgment of the configuration. No other
configuration should ever be required until a setup change is desired.
To get existing setups:
1) The Master Sets 2
nd
bit in the Status & Command to 1. PUV = 2
2) The I/O Module reads the PUV= 2, the I/O Module will get the
configuration parameters from the gauge and update the Master’s
Profibus memory.
3) The I/O Module sets Master PUV = 2
4) When the Master sees PUV=2, the Master can read the configuration
parameters.
5) Master sets PUV to 0.
When retrieving data from the LS9000/LS8000 gauge, data is first downloaded
from the gauge and then sent to the Profibus connection. This can take several
seconds.