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Slave Unit Numbers with Multiple Terminators
7-7-2
Notification Method for Multiple Terminators
C120/C500
Display
SR Area
15
14
13
Bit number
SR 59
Location of error
Remote I/O Master Unit
or
Remote I/O Slave Unit
R
t I/O Sl
U it
Remote Terminal
Summary
C1000H/C2000H/C2000
Display
98
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CPU Unit
Remote I/O errors are not indicated on the CPU Unit.
Master Unit
Display
END RS CHK
(T
(Terminator check)
i
h
k)
12
11
10
9
8
7
Bit 15 to 8
Bit 15 to 8
Meaning
B0 Hex
The digit on the right (0 to
to
3) indicates the mounting
)
B3 Hex
B3 H
order of the Master of the
d
f th M
Remote I/O Subsystem
involved.
00 (BCD)
Indicates the word address
to
setting for the Remote
31 (BCD)
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.
CPU Unit
Remote I/O errors are not indicated at the CPU Unit.
Master Unit
Display
END RS CHK
(Terminator check)
(T
i
h
k)
Lit
Lit until a terminator is found.
Flashing
Flashes if multiple terminators are set.
Unlit
Turns OFF if one and only one terminator is
found.
6
5
4
3
2
1
0
0
Bit 7 to 4
Bit 7 to 4
8 (BCD)
g
t
f th
0 (BCD)
1 (BCD)
0, 1 (BCD)
Lit
Lit until a terminator is found.
Flashing
Flashes if multiple terminators are set.
Unlit
Turns OFF if one and only one terminator is
found.
Section 7-7
Function
0
Error Check Bit
Remote I/O Error Flag
Meaning
Indicates error in Remote
I/O Master Unit.
Indicates error in Remote
I/O Slave Unit with unit
number #0.
Indicates error in Remote
I/O Slave Unit with unit
number #1.
Either 0 or 1 indicates error
in Remote Terminal.
Function
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