P890 and P892 Switch Settings for the Drop Address

Overview

Before installing the P890 or P892 processor, you must set the switches located on the bottom of the unit. The P890/P892 processor has one set of eight switches used to select drop/port address and ASCII communications handshake method.

P890/P892 Drop Address Switch Settings

View of the switches

Description of the switches

Switches	Functions
For P890 and P892 1-6	drop/port address 1-32 binary form
For P890 ONLY 7-8	not used, set to left
For P892 ONLY 7 8	hand shaking for port 1 hand shaking for port 2 L = Data Terminal Ready/Data Set Ready R = Xon/Xoff

NOTE: You MUST go into the Traffic Cop software and set the ASCII port number to match your switch selection, noting the drop.

NOTE: Drop and port addresses are related. Switch settings for Drop #3 correspond to ASCII ports 5 and 6.

Drop Address Switch Settings

The drop address is set by the setting switches one through six in the switchpack as shown in the table.

Switches
1	2	3	4	5	6
						Drop Address	Port Number For P892 ONLY
L	L	L	L	L	L	1	1,2
R	L	L	L	L	L	2	3,4
L	R	L	L	L	L	3	5,6
R	R	L	L	L	L	4	7,8
L	L	R	L	L	L	5	9,10
R	L	R	L	L	L	6	11,12
L	R	R	L	L	L	7	13,14
R	R	R	L	L	L	8	15,16
L	L	L	R	L	L	9	17,18
R	L	L	R	L	L	10	19,20
L	R	L	R	L	L	11	21,22
R	R	L	R	L	L	12	23,24
L	L	R	R	L	L	13	25,26
R	L	R	R	L	L	14	27,28
L	R	R	R	L	L	15	29,30
R	R	R	R	L	L	16	31,32
L	L	L	L	R	L	17	N/A
R	L	L	L	R	L	18	N/A
L	R	L	L	R	L	19	N/A
R	R	L	L	R	L	20	N/A
L	L	R	L	R	L	21	N/A
R	L	R	L	R	L	22	N/A
L	R	R	L	R	L	23	N/A
R	R	R	L	R	L	24	N/A
L	L	L	R	R	L	25	N/A
R	L	L	R	R	L	26	N/A
L	R	L	R	R	L	27	N/A
R	R	L	R	R	L	28	N/A
L	L	R	R	R	L	29	N/A
R	L	R	R	R	L	30	N/A
L	R	R	R	R	L	31	N/A
R	R	R	R	R	L	32	N/A

NOTE: Drop addresses 1 to 16 can be used as RIO and ASCII. However, drop addresses 17 to 32 can ONLY be used as RIO.

9-Pin ASCII Ports

Correct cable configuration is dependent upon the requirements of the unit attached to the ascii port.

Pin Number	Designation
1	Chassis Ground (CG)
2	Receive (RXD)
3	Transmit (TXD)
4	Data Terminal Ready (DTR)
5	Signal Ground (SG)
6	Data Set Ready (DSR)
7	Request to Send (RTS)
8	Clear to Send (CTS)
9	No Connection (N.C.)

Sample Pin Layout for a 9-Pin ASCII Port

The following graphic depicts one possible pin layout for a cable connecting a P892 ASCII port and another device using hardwired flow control. Actual pin numbers may vary from device to device.