96
I/O Table Creation Problems
Section 7-6
7-7-2
Notification Method for Multiple Terminators
C120/C500
CPU Unit
Remote I/O errors are not indicated on the CPU Unit.
Master Unit
Display
Function
END RS CHK
(T
i
h
k)
Lit
Lit until a terminator is found.
(Terminator check)
Flashing
Flashes if multiple terminators are set.
Unlit
Turns OFF if one and only one terminator is
found.
SR Area
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit number
SR 59
0
0
Error Check Bit
Remote I/O Error Flag
Bit 15 to 8
Bit 7 to 4
Location of error
Bit 15 to 8
Meaning
Bit 7 to 4
Meaning
Remote I/O Master Unit
or
/O S
B0 Hex
to
The digit on the right (0 to
3) indicates the mounting
f
f
8 (BCD)
Indicates error in Remote
I/O Master Unit.
o
Remote I/O Slave Unit
o
B3 Hex
3)
d ca es
e
ou
g
order of the Master of the
Remote I/O Subsystem
involved.
0 (BCD)
Indicates error in Remote
I/O Slave Unit with unit
number #0.
1 (BCD)
Indicates error in Remote
I/O Slave Unit with unit
number #1.
Remote Terminal
00 (BCD)
to
31 (BCD)
Indicates the word address
setting for the Remote
Terminal.
0, 1 (BCD)
Either 0 or 1 indicates error
in Remote Terminal.
Error Check Bit
If there are errors in more than one Slave, or multiple terminators have been set,
data for the Units can be accessed in order by turning this bit ON and OFF.
Remote I/O Error Flag
This flag indicates that an error has occurred in a Remote I/O Slave Unit or a
Remote Terminal (or an Optical I/O Unit or I/O Link Unit). It also turns ON where
there is more than one terminator set.
Multiple terminators are detected as follows:
•
The “END RS CHK” indicator on the Remote I/O Master (RM) Unit flashes.
•
By turning SR 5900 ON and OFF, the Slaves set as terminators can be
read in order.
C1000H/C2000H/C2000
CPU Unit
Remote I/O errors are not indicated at the CPU Unit.
Master Unit
Display
Function
END RS CHK
(T
i
h
k)
Lit
Lit until a terminator is found.
(Terminator check)
Flashing
Flashes if multiple terminators are set.
Unlit
Turns OFF if one and only one terminator is
found.
Display
Summary
Display