AMS DCB-274 manual Reset, Port Read/Write, Inputs, Outputs

ADVANCED MICRO SYSTEMS, INC. SMC-27X2 SOFTWARE

An example of this command within a program in conjunction with the Loop on Port command as explained later is:

P 0	Enter program mode.
M 2000	Move at a constant step rate of 2000 SPS.
L0 0	Loop to memory address location 0 until port 1 is low.

@Decelerate and stop program execution.

P	Exit program mode.
Command	Function		Type		NV Bytes
^C	Reset Controller		None		N/A
	Mnemonic	Data 1		Data 2	Result
	(Name) ^C	None		None	None

^C (Reset)

Resets controller to power-up condition, waiting for start sequence. It is analogous to “Ctrl-Alt-Delete” - reboot the computer. All outputs are set high, defaults are reloaded from NV memory, and position is set to zero. This command may not be used within the non-volatile program memory. This does not modify the NV memory values.

Command	Function		Type		NV Bytes
A	Read/Write to Ports		Immediate, Program		2, 2
	Mnemonic	Data 1		Data 2	Result
	(Name) A (n)	0-129		None	Port Data

A (Port Read/Write)

This command controls the user input/output ports.

Inputs

The A129 command will read a value between 0 and 7 (or 0 and 15 if port 4 is configured as an input). Output ports are not read.

Ports 1, 2, and 3 (flags 1, 2 and 4) are input ports only. The PLC option flag 8 inverts the sense of these inputs. Refer to “l” (lower case L) command for option flag information.

Port 4 is configurable as either an input or output, with jumpers.

Port 4 defined as	JP1	JP2
Input	2-3	1-2
Output	1-2	Open

Port 4 as an input:

1.Install JP1and JP2.

2.Insure that P4 input option flag 32 (“ l” command) is on.

Outputs

One or two user outputs are available. They will withstand in excess of 30 Vdc and will sink over 1 amp to a low voltage when turned on. In the off state (after reset and power-up) they have a weak pull up resistor to VIO.

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