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4. INTERFACE BETWEEN THE NC AND PMC
309
If a failure occurs, or the machine halts while waiting for an external
signal such that it appears as if a failure has occurred, it is necessary to
check the internal status of the CNC using the CNC self–diagnosis
function, or to find the cause from the status of the interface between the
CNC and PMC using the DI/DO monitor function.
The DI/DO monitor function displays the status of the DI/DO signals
using the following two formats.
D 8–bit binary number, in sequence of signal addresses
D Signal–by–signal decimal number by assembling signals that extend
over multiple bits
Display the DI/DO monitor screen according to Section 1.1.5.4, “System
procedure”.
Range of displayed signals
Signal address
Bit numberSignal value (0,1)
Fig. 4.4.1 (a) DI/DO Monitor screen (Bit Display)
DI/DO signals are displayed using an eight–bit (one–byte) binary number
in sequence of their addresses.
4.4
DI/DO MONITOR
FUNCTION
4.4.1
DI/DO Monitor Screen
D Bit display