AWC Module Serial I/O Ports

The AWC board has three serial I/O connectors, two RS-232 and one RS-422/485 port (see AWC Connectors). Systems using a programmer's terminal (ASCII) connect through the RS-232/Term port on the AWC module.

To configure the speed and other communication parameters for these ports, use the CONFIG_C utility program, the V+ FSET program instruction, or the FSET monitor command. Designations for AWC Serial Ports shows the designations that are used by CONFIG_C and V+ to configure or access the serial ports.

Table 6-6. Designations for AWC Serial Ports

Port Number	Port Protocol	CONFIG_C Designation	V+ Designation
1	RS-422/485	LOCAL_PORT 1	LOCAL.SERIAL:1
2	RS-232	LOCAL_PORT 2	LOCAL.SERIAL:2
3	RS-232	LOCAL_PORT 3	LOCAL.SERIAL:3

Figure 6-2. AWC Connectors

Serial Port 1 (RS-422/485)

The RS-422/485 connector (see AWC Connectors) is a 6-pin circular mini DIN female connector. The pin assignments are shown in RS-422/485 Connector Pin Assignments. RS-422/485 is a point-to-point protocol for connecting to a single destination. This port can also be configured as a multidrop port (RS-485).

Table 6-7. RS-422/485 Connector Pin Assignments

Pin	Signal	Type
1	GND	Ground
2	GND	Ground
3	TXD-	Output
4	RXD+	Input
5	TXD+	Output
6	RXD-	Input

Serial Port 2 (RS-232/TERM)

The RS-232/Term connector is an 8-pin circular mini DIN female connector (see AWC Connectors). The pin assignments and locations are shown in RS-232/Term Connector Pin Assignments. This port supports the DTR, DCD, RTS, and CTS signals used for hardware handshaking (also known as modem control). By default, these signals are not enabled.

Terminal Mode (ASCII Terminal) Interface

The customer-supplied ASCII terminal plugs into this connector on the AWC module.

Used With a VGB Interface

In systems with a PC or VGB interface, this connector can be used for general serial communication. However, the user can also redirect the monitor output to this connector.

Table 6-8. RS-232/Term Connector Pin Assignments

Pin	Signal	Type
1	DTR	Output
2	CTS	Input
3	TXD	Output
4	GND	Ground
5	RXD	Input
6	RTS	Output
7	DCD	Input
8	GND	Ground

Serial Port 3 (RS-232)

This connector is identical to the RS-232/Term connector. This connector can be used for general serial communication but not for connecting a user-supplied terminal.

LED Status Indicators on the AWC

The LEDs on the front of the AWC board give the following information about the status of the main AWC CPU.

Table 6-9. AWC Board LED Status Indicators

LED Display 1 2 3	Error #	Description
O-O-O	0	No error.
O-O-R	1	System clock is dead or too fast. Clock interrupts are not being received.
O-R-O	2	Hardware configuration error. Address switches/SYSCTL wrong.
O-R-R	3	Graphics board failure. VGB not responding.
R-O-O	4	Memory test failure. Free storage error.
R-R-O	6	Software serial I/O configuration error.
G-O-O	C	Uninitialized trap.
G-O-G	D	Bus error detected.
O = Off G = Green R = Red

If the AWC displays any of the above errors, contact Adept Customer Service.