Altinex manual Installing Your MT109-100, Operation, RS-232 Control, 1 RS-232 Interface

Step 1. Determine how the MT109-100is going to be configured. A standard MT109-100is an 8-In, 1-Out switcher, but two MT109-100s (one Master and one Expansion) may be configured as a 15-In, 1-Out switcher.

In Application Diagram, DIAGRAM 4, on page 8, the Master is set to accept 7 external inputs and 1 internal input. The Expansion card has 8 external inputs (inputs 8-15). For RS-232 commands, the 8 external inputs of the Expansion card must still be configured as inputs 1-8.

For example, if the Master is in slot 1 and the Expansion card is in slot 2, select inputs using the following commands:

To select input 1: [ON1C1]

2:[ON2C1]

...

7:[ON7C1]

To select input 8: [ON8C1] [ON1C2]

9:[ON8C1] [ON2C2]

...

15:[ON8C1] [ON8C2]

Step 2. Turn off power to the MultiTasker system and disconnect from AC power.

Step 3. Remove a slot cover (MT200-101) from an unused slot. Identify the slot number and note that it is for RS-232 control.

Step 4. Slide the MT109-100into an available slot in the MultiTasker in order to connect to the bus. Make sure that the MT109-100fits into place and then secure the card by tightening the retainer screws located on the top and bottom of the card.

Step 5. Restore power to the MultiTasker system.

Step 6. The LED on the card panel will turn red indicating the card is operational. An LED that is blinking red indicates a problem. If the LED is blinking, see the Troubleshooting Guide in section 8.

Step 7. Connect the audio sources to the input connectors of the MT109-100. Connect the output of the MT109-100to the receiving device.

Step 8. The MT109-100is now operational.

7.1 RS-232 CONTROL

The MT109-100has many advanced remote-control capabilities accessible through standard RS-232 communication. Control may be accomplished through a computer control system or any other device capable of sending RS-232 communication.

7.1.1 RS-232 INTERFACE

The control commands for the MT109-100are in a simple ASCII character format.

1.Square brackets “[ ]” are part of the command.

2.Use uppercase letters for all commands.

The cards in a MultiTasker system are capable of performing various functions, as well as providing feedback to the user or control system. Commands instruct a card to perform actions or request information from the card. Some commands do both simultaneously.

A command that instructs the card only to perform an action will generate feedback of “[ ]”. The open bracket immediately followed by a close bracket indicates the card received a valid

command. If the command requested information from the card, the feedback generated by the card is the acknowledgement of having received a valid command. Invalid commands generate feedback of “[ERR001]”.

After processing a command, an “OK” or [ERR001] will be returned as feedback if ‘F’ is included at the end of a command string.

Commands ending in ‘S’ will be saved into memory. Commands not ending in ‘S’ will still be executed, but will not be restored when the system is reset or powered off, then on.