Unication Messenger m90 Bedienungsanleitung PDF herunterladen (Seite 341)

FAQs

333

• When defined as length, SI

143 cannot exceed SI 144.

144 Maximum Length Up to 128

• This is the maximum legal

length for received text.

• When the maximum length is

exceeded, the Receive Buffer

is automatically cleared, and

SB 60 is turned OFF, enabling

new data to be received.

• This can be used to detect

buffer overflow.

145 Start Address:

Receive Buffer

MI Address This MI contains the start address for

the vector of registers that serves as

the Receive Buffer.

60 Number of Bytes

currently in Receive

Buffer

Read only SI 60 indicates how many bytes of

data are currently in the Receive

Buffer.

61 Number of Bytes in

Receive Buffer when

SB 60=1

Read only SI 61 indicates how many bytes of

data are in the Receive Buffer when

SB 60 turns ON.

146

Copy Data: Format 0: copy each

received byte

1: copy in groups of

4 received bytes.

• 0 causes each separate byte

to be copied to a separate

ETX.

• 1 causes every 4 bytes to be

copied to a single register,

without the STX and ETX. This

is used when the received

data is in numeric format.

For example 12345 would be

copied to 2 consecutive MIs.

The first MI would contain

1234, the second would

contain 5.

140

Start receiving 300 In your application, use this to call the

function after you have entered all of

the other parameters.

Note that when you run Test (Debug)

Mode, the current value in SI 140 will

not be displayed.

SB Description Notes

60 Data Successfully

Received

Read only. Turns ON when the ETX condition is registered by

the system.

61 Copy Data in Receive

Buffer to MI Vector

Write only.

• Turning this SB ON causes the buffer contents to be

copied to the MI vector defined in SI 145. The data

will be copied according to the format defined in SI

146.

• If SI 146 is set to 0, this SB can be set at any time.

If SI 146 is set to 1, this SB can be set after SB 60

turns ON.

62 Clear Receive Buffer,

Clear SI 60,

Clear SI 61,

Reset SB 60

• This SB must be turned ON to enable a new

message, or data block, to be received.

• Turn this SB ON to enable data to be received before

the maximum length, defined in SI 144, is exceeded.

Note that if no data is received for a period exceeding the M90 TimeOut, you will lose the

data in the buffer.

To see how to use the Communications Utility, check the sample application Read Card -

Display Number Value.U90. This may be found by accessing Sample U90 Projects from

the Help menu.

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