Remote Processing RPC-2300 - Manual (Page 20)

DIGITAL LINES CHAPTER 6
Page 18 RPC-2300
High cur rent outpu ts at J3 port A are option ally
configurable as TTL I/ O by replacing U20 with a DIP
shunt jumper. This keeps logic com patible with ports B
and C. If opto channels 8-15 are used as inputs, then
U20 must be replaced by a DIP shunt jumper.
Configuring digital I/O lines
Lines are configured during progr am execution using the
CONF IG PIO command. On power up or reset, all lines
are inputs.
When a line is configured as an output, it can sink a
maximum of 2. 5 mA at 0. 4V and can source a minimum
of 2.5 ma at 2. 4V. W hen driving opto modules, the
outputs sink 15 mA at 1.0V.
Digital I/ O prog ramm ing exam ple
The follow ing exam ple read s a switch at po rt A, bit 3
(J2-25), reads an opto module at channel 1 and writes an
opto module at channel 5. A LE D is controlled at J2-10
(port B, bit 0).
200 D = BIT(0,3) :'Read switch status, port A
210 F = OPTO(101) :'read opto module, ch. 1
220 OPTO 103,ON :'write module, channel 3
230 BIT 1,0,0 :'turn on led at J2-10
240 BIT 1,0,1 :'turn off led at J2-10
250 A = LINE(103) :'Reads pin 3 at J2
Conne ctor pin ou t - J2
Pin # 82C55 Description Opto
Channel
19 Port A, line 0 8
21 Port A, line 1 9
23 Port A, line 2 10
25 Port A, line 3 11
24 Port A, line 4 12
22 Port A, line 5 13
20 Port A, line 6 14
18 Port A, line 7 15
10 Port B, line 0 16
8 Port B, line 1 17
4 Port B, line 2 18
6 Port B, line 3 19
1 Port B, line 4 20
3 Port B, line 5 21
5 Port B, line 6 22
7 Port B, line 7 23
13 Port C, line 0 Lower C 0
16 Port C, line 1 Lower C 1
15 Port C, line 2 Lower C 2
17 Port C, line 3 Lower C 3
14 Port C, line 4 Upper C 4
11 Port C, line 5 Upper C 5
12 Port C, line 6 Upper C 6
9 Port C, line 7 Upper C 7
26 Ground
2 + 5V