Octagon PC-510, User Manual

Page: 67 / 239

5-6
Serial ports PC-510 user’s manual
Table 5-10 Available addresses for COM5 at port 0A9h (IRQ 15 default, routable)
I/O range
select A
(bit 5)
I/O range
select B
(bit 4) COM5 addresses
' '(
' ' '(
'()
' '(
)/
COM6
COM6 is an industrial RS-232 or a two-wire RS-485 port. COM6 can
also be used to route the RTCM SC-104 differential correction data to
the GPS receiver. When using this port to route the RTCM SC-104 data
to the GPS receiver, the RS-485 portion of the interface remains fully
functional, however, the RS-232 function is lost. The I/O address for
COM6 is 328h (default). You can change the default address to 128h,
148h, and 348h through the interrupt routing matrix. The interrupt for
COM6 is logically OR’d with COM3 through COM5. COM5 and COM6
share J5, 20-pin header. For more information, see
COM3 through
COM6 interrupt/status port section in this chapter.
Table 5-11 Available addresses for COM6 at port 0A9h (IRQ 15 default, routable)
I/O range
select A
(bit 5)
I/O range
select B
(bit 4) COM6 addresses
RS-485 transmitter
control (bit 1)
' ( (
' ' ( (
() ()
' ( (
)/
Note See the Accessories appendix for connector information on COM5 and
COM6.
≡
Null modem cable
Use a VTC-20F cable to connect either COM1 and COM2, or COM3
and COM4, or COM5 and COM6 ports to external serial equipment.
The P2 and P3 connectors are DB-9 female connectors which plug
directly into a 9-pin PC serial cable. When interfacing the PC-510 to
your desktop PC, you must use a null modem adapter.