Masters and Slaves
Section 4-1
51
Indicators
LINE ERROR
Lights for transmission line errors. Remains unlit while transmission line remains normal.
XMT/RCT
Setting of 0 or 1 on unit number switch
Flashes when any of the Slaves or Remote Terminals in
the Master Subsystem are transmitting normally. Goes
out if all Slaves and Remote Terminals are abnormal or
for errors occurring in the CPU Unit refresh cycle.
Setting of 2 or 3 on unit number switch
Goes out if an error occurs in any Slave or Remote Termi-
nal transmitting data or for errors occurring in the CPU Unit
refresh cycle. All transmissions will be stopped when this
indicator goes out.
ERROR
Lights if an error occurs in any Slave or Remote Terminal transmitting data or for errors occurring in the
refresh cycle. Remains unlit as long as all Slaves and Remote Terminals transmitting data are normal.
END RS
Lights at the beginning of operation until a terminator is detected. Flashes if more than one terminator
is found. Refer to 7-7 Slave Unit Numbers with Multiple Terminator.
Switches and Selectors
Unit Number
(“Machine No.”)
Set to 0 or 2 to set Unit #0; 1 or 3 to set Unit #1. If 0 or 1 is used, transmission will continue even if a
transmission error occurs. If 2 or 3 is used, transmission to all Slaves will be interrupted if a trans-
mission error occurs.
The only setting necessary for C200H Masters is the unit number. Power to
the PC must be turned off when setting Master unit numbers. The unit num-
ber determines AR area Error flags and Restart bits (see 7-2 Error Codes
and Monitoring).
4-1-4
C200H Slaves
Two models of C200H Slave are available: C200H-RT201 and
C200H-RT202. They differ only in the power supply. The C200H-RT201 is
switchable between 100/110 VAC and 200/220 VAC; the C200H-RT202 uses
24 VDC. Indicators and switches are the same for both. The RT201 is shown
below.
Transmission
terminals
Switch cover
Remove to access DIP
switch and terminator selec-
tor.
Power supply
fuse
Power supply terminals
