SILENT KNIGHT 4720 Installation Manual download pdf (Page 51)

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Model 4724 Control Expander Installation Manual (P/N 150596-02, Rev. A) Revised 8/98

Example:

In a non-split system (only one area), the following two-statement step will cause X-10 Module 1

to turn on if Area 1 is armed (the lamp or appliance is controlled by X-10 Module 1 would then turn

on):

GET1 @B0.0

PUT1 @9D.0

The first statement gets a status bit from the 4724 memory address that shows the armed status of Area

1. (If the status bit = 0, Area 1 is not armed. If the status bit = 1, Area 1 is armed.)

The second statement puts the bit into the 4724 memory address that determines whether the X-10

Module will turn on or off. (If the bit =0, the X-10 Module will be turned off. If the bit = 1 the X-10

Module will turn on.)

To generate an output that represents a specific combination of conditions, you first program the system

to get data from different locations, next perform a logical or arithmetic operation on the data, and then

put the result on the desired output port.

In this case, there can be more than one GET statement associated with one PUT statement. However,

the various bits (or 8-bit groups) obtained in the GET statements are combined into one bit (or 8-bit

group) as a result of the operations performed on them. Therefore, only one PUT statement is required

to empty the stack (see statements 25-28 in the default program, Table 15, “Default I/O Program,”

located later in this section).

The 4724 can store up to 32 pieces of data on the stack before performing any operations. Each opera-

tion is performed on the last one or two pieces of data that were put on top of the stack, either by a GET

statement or as the result of a previous operation.

8.17.1 Stepping Through the I/O Program

When you enter programmable I/O statements (Menu 16), Line 1 of the display will show the first step

of the current I/O program. A typical display is: 1 GET 1 @B0.0. The number on the left is the state-

ment number. The command is shown next, followed by the 4724 memory location from which the sys-

tem is getting the data.

Line 2 will show the appropriate key prompts.

■ To advance to the next statement, press the TEST key.

■ To go back to the previous statement, press the STAT key.

■ The last statement of the program is always END.

8.17.2 Program Operations

The 21 program operations are listed in Table 13, along with the functions they perform.

Of the 21 operations, five require additional data. They are listed below:

■ 9:GET1,

■ 10:GET8,

■ 11:GETC,

■ 12:PUT1, and

■ 13:PUT8.

To select an operation, key is the number shown beside the operation on the display, then press the

TEST key. After you select one of these operations, the display will prompt you for the information to

be entered. If an address is requested, look it up in Table 14, “Status and Port Addresses,” located later

in this section.

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 81 82

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