Error Detection Processing 8-1 To; Measured Temperature Range Over - Hitachi HIDIC EH-150 Instruction Manual

8. Error Detection Processing

8.1 Measured Temperature Range over

(1)Interlock
If temperatue conversion data is over the measuring range or current terminal wiring is disconnected, the
tempearature conversion data becomes H7FFF.
If H7FFF is read, it is necessary to make a program externally for detection the error.
Example of an error detection program
WM000 = H0000
M0000 = WX000 == H7FFF
M0001 = WX001 == H7FFF
M0002 = WX002 == H7FFF
M0003 = WX003 == H7FFF
M0008 = WM000 <> H0000
Xa
M0008
Yb
Please take a proper countermeasure by using the coil Yb.
Set the numbers of the "a" and "b" corresponding to the actual system.
8. Error Decttion Processing
Yb
For error data, Yb is turned
on.
Xa is for reset.
8-1
The program checks for
error data.
When one error data is
found, M8 is turned on.