21
Nomenclature and Functions
Section 2-1
Unit No. Switch
Set the unit number to between 0 and F. If the same number is set for other
Special I/O Units, an I/O Unit Overflow error (fatal) will occur, and the system
will not operate.
2-wire/4-wire Switch
(C200H-ASC21 Only)
On the C200H-ASC21, the RS-422A/485 port can be set to either 2-wire or 4-
wire communications.
2: 2-wire
communications
4: 4-wire
communications
Terminating Resistance
Switch (C200H-ASC21
Only)
On the C200H-ASC21, the RS-422A/485 port’s terminating resistance (220
Ω
) can be turned ON or OFF.
ON: Terminating
resistance
connected.
OFF:
Terminating resistance disconnected.
2-1-3
Rear Panel
User Memory Default
Switch
When an error occurs in the ASCII Unit as a result of damage to the user
memory, this switch can be used to forcibly format (delete all programs from
memory) the user memory and return the ASCII Unit to normal operating sta-
tus.
Note
During normal operation, make sure that the user memory switch is turned
OFF (set to the left). If the switch is turned ON (set to the right) and the power
turned ON, all programs in the ASCII Unit will be deleted. Refer to
9-2 Trou-
bleshooting
for details on processing errors.
ON:
All user memory will be formatted (returned to default settings)
OFF:
User memory will not be formatted.
Battery
The battery backs up the ASCII Unit’s BASIC program, trace memory, and
real-time clock settings when power is not being supplied. If the battery volt-
age drops, or the battery is not connected, the Error Indicator on the front
panel will flash.
Refer to
9-5 Maintenance
for details on replacing the battery.
CPU Unit
Unit No. setting range
C200H-CPU01-E/02-E/03-E
C200H-CPU21-E/22-E/23-E/31-E,
C200HS-CPU01-E/21-E/31-E/03-E/23-E/33-E,
C200HE-CPU11-E/32-E/42-E/11-ZE/32-ZE/42-ZE,
C200HG-CPU33-E/43-E/33-ZE/43-ZE,
C200HX-CPU34-E/44-E/34-ZE/44-ZE
0 to 9
C200HG-CPU53-E/63-E/53-ZE/63-ZE,
C200HX-CPU54-E/64-E/54-ZE/64-ZE/65-ZE/85-ZE
CS1H-CPU66-E/65-E/64-E/63-E
CS1G-CPU45-E/44-E/43-E/42-E
0 to F
MACHINE
No.
Indicates
the Unit
No.
4
WIRE 2
TERM OFF
ON
ON
OFF
Part name
(replacement part)
Model
Battery Set
C200H-BAT09
Содержание C200H-ASC11
Страница 1: ...C200H ASC11 ASC21 ASC31 ASCII Units Operation Manual Revised June 2000...
Страница 2: ...iv...
Страница 4: ...vi...