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Chapter 2 Hardware
2.3 RUN/HALT Switch
2
This switch stops/starts the FL654A's I/O module input and output. Generally, the switch is used in
the RUN position, and it is switched to HALT if I/O module input/output is to be temporarily halted. If
the switch is changed over from HALT to RUN in a mid-course, I/O module input/output maintains
the status brought about at power-ON or in the RUN condition before switching. Therefore, change
of talker/listener block, described later, in a HALT condition will not be reflected.
2.4 Node Address Switches (NA-H, NA-L)
These switches are hexadecimal rotary switches that set a node number on the FL-net, and are
located on the front panel of the module. They are set using a small flat-head screwdriver. This node
number will be the host address of an IP address. This setting causes the IP address to be
192.168.250.N. Where "N" represents the node number set using this switch. "N" is set in the range
of 1 to 254 (1 to 16#FE in hexadecimal) For more information on this, see 9.3.4, FL-net IP Address,
in the FL-net Module Common User's Manual.
Do not use node number "0" since it has been reserved as a special address for factory setting. If
the switch is set to "0," the FL654A does not operate. Also, node number 255 (16#FF in
hexadecimal) is prohibited to use. If the switch is set to this value, an address setting error occurs,
making the FL654A go down mode. Moreover, because node address setting is read when power to
the FL654A is turned ON, if you wish to change the setting, turn OFF the power, change the address,
and then turn ON the power again.
Switch Name
NA-H
NA-L
8
6F8C1625
Figure 2-3 RUN/HALT Switch
Figure 2-4 Node Address Switches (NA-H, NA-L)
Table 2-3 Node Address Switch Setting
Setting Description
Sets the high-order 4 bits of hexadecimal node number (8 bits).
Sets the low-order 4 bits of hexadecimal node number (8 bits).
HALT
RUN
NA-H
NA-L
The node address number is
set to "01" at factory default.
Remarks
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