York Universal LINC485, Руководство по установке

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YORK INTERNATIONAL
23
FORM 450.20-N20 (702)
3
INSTALLATION
Figure 10. Universal LINC485 DIP Switch Positions
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
S1 Device Type
Not Used
B1 Mode Selection
Not Used
1 Node Address
2 Node Address
4 Node Address
8 Node Address
16 Node Address
32 Node Address
64 Node Address
CS LAN Transfer Rate
S1 Device
OFF Router
ON Repeater
Device Type
Mode Selection
Set the node DIP switches to a unique valid
address between 1 and 92. Sum the values of
each switch in the ON position to determine
the address setting, i.e., 1 + 4 + 64 = 77
Node or Sub-network Address
LAN Transfer Rate
CS
OFF
19.2 kbaud
ON 50 kbaud
NOTE: Baud rate selection is only
read at power up of the unit. Any
changes during operation will not
take effect until next power up.
B1 MODE
OFF 19.2 kbaud
ON 50 kbaud
NOTE: Serves as a filter when
operating as a repeater. Set to OFF
at 19k2 and when installed on the
base at 50k. Set to ON for
subnetworks operating at 50k.
To determine if a message is passed on, the repeater
analyzes the destination address. The destination
address consists of two parts; a network address and a
node address. When a message is sent, the sending
device only includes the network address if the
destination is outside of the sending subnetwork.
Using this network address, a “smart” repeater can
determine if the message needs to “pass” through to
the other side. When the Mode switch is set to ON:
Messages from LAN PORT 1 to LAN PORT 2 are
allowed to pass only if:
a. the destination node address is greater than
the node address of the repeater.
b. or a network address is included.
Messages from LAN PORT 2 to LAN PORT 1 are
allowed to pass if:
a. the destination node address is lower than
the node address of the repeater.
b. or a network address is included.
When the Mode switch is set to OFF:
Messages from LAN PORT 1 to LAN PORT 2 are
allowed to pass only if:
a. the destination node address is greater than
the node address of the repeater.
b. and a network address is not included.
Messages from LAN PORT 2 to LAN PORT 1 are
allowed to pass if:
a. the node address is lower than the node
address of the repeater.
b. or a network address is included.
To simplify the selection of the Mode switch posi-
tion:
When operating as a repeater on the “base” segment
(subnetwork 99), set the switch to ON.
When operating as a repeater on a subnetwork,
(other than 99) set the switch to OFF.
Node (Subnetwork) Address
Referred to as a node address, the Universal
LINC485 uses switches 5 through 11 to set the
subnetwork address when configured as a router. The
binary switches, when summed, add up to the net-
work address.
When the Universal LINC485 is operating as a router,
certain constraints apply:
• The base network must be connected to LAN
PORT 1 and the subnetwork must be connected
to LAN PORT 2.