Industrial Data Systems IDS Scale Basic User Manual
Page 48
Scale Basic 4.2E
Reference
S / I
Purpose: Status / Idle pairs are used to verify that a remote station is available to accept
commands.
Remarks: network systems are normally setup in a master/slave configuration. The master units
sends ‘S’ command to the slave unit. The slave replies with an ‘I’ status if it is on line and
available. The Master receives the ‘I’ as a command to execute user function 14.
Example: scan all network addresses for available stations.
1.
Memory10 is used as the current station ID register.
2.
Print label 32 = N
command.
3.
Timer1 is used to determine that a station is not responding. If it times out it activates
function 2.
4.
Function 2 decrements Memory10 and checks for end of scan.
5.
F1 activates function 1 which starts the station scan.
Timer1: 2, 2
Set for 0.2 sec time-out, activate function 2
Fn. 1:
Set Memory10, 0=255
Set current station ID = 255
Goto User2
Goto user function 2
End
End
of
function
Fn. 2:
Dec Memory10
current station ID = current station ID - 1
If positive
If not end of scan
Timer
on,
1
reset
timer
1
Txcom1, Label32
transmit next station request
Else
Else
Timer off, 1
turn off timer 1
Txcom1, Label32
deselect all stations by selecting station 0
End
if
End
if
End
End
of
function
Fn. 14:
Make id, Memory10
Make a new ID with station ID as the ID number
Goto User2
Goto user function 2
End
End
of
function
NOTE: On the slave stations, only parameter 27 (station ID) needs to be configured. All
other functions in the slave operate automatically and in the background.
X0 / X1 / X2
Purpose: to turn off continuous transmit, transmit TX2 data 1 time, or turn on continuous
transmit of TX2 data.
Remarks: EZ Link, I/O Ports, TX Format (Parameter 28) selects a data format that can be sent
out communications port 2. Parameter 27=0 or serial input command X0 turns off
continuous transmit of TX2 data. Parameter 27 = 255 or serial input command X2 turns on
continuous transmit of TX2 data. Serial input command X1 transmits TX2 data 1 time.