S-Register; Figure 5-3 S-Register - Hitachi J.NET User Manual

5. Programming

5.3 S-register

The S-register stores error information for N1 and N2 respectively. If an error occurs in any one of the stations
(substations) connected to N1 or N2, the corresponding bit is set to 1.
SW0A∆0
Symbol
S0A∆0
S0A∆1
S0A∆8
S0A∆9
Note: Other bits cannot be used.
15
2
N1 ERR
N1 ALM
(Note) ALM: Communication error
ERR: Hardware error
∆: = 0: Main module
= 8: Sub module
= A: Sub2 module
= C: Sub3 module
Bit
0 Communication over NET1 is proceeding normally.
1 A communication error occurred in NET1.
0 NET1 is running normally.
1 A hardware error occurred in NET1.
0 Communication over NET2 is proceeding normally.
1 A communication error occurred in NET2.
0 NET2 is running normally.
1 A hardware error occurred in NET2.

Figure 5-3 S-register

8 7
2 2
N2 ERR
N2 ALM
Description
5-4
0
2