Horner-apg SmartStix Analog Programming Guide Instrukcja Użytkownika Pobierz pdf (Strona 9)

MAN0703-01 24 SEP 2003 PAGE 9

Table 9 – Consumed Directed Digital Data Word 4

16-bit Word

8-bit High Byte 8-bit Low Byte

Input / Heartbeat Send Time Data Life Expectancy Time Data

0.0 to 25.5 seconds = Minimum Send Interval 0.0 to 25.5 seconds = Maximum Receive Interval

See Directed Data Word 3’s CLT, CHT and CIT command descriptions (page 8).

Table 10 – Consumed Directed Digital Data Word 5

16-bit Word

8-bit High Byte 8-bit Low Byte

0 = Force Off / On 1 = Hold-Last-State Default Digital Output Data - Low Word

H16 H15 H14 H13 H12 H11 H10 H9

H16…H9 Determines default state of the SmartStix Analog I/O Module’s Analog Outputs, if any, when

the configured Life Expectancy Time expires. If an H bit is 1, its corresponding Analog

Output holds its last state. If an H bit is 0, its corresponding Analog Output is forced to the

value contained in the associated Default Consumed Directed Analog Data Word (Table 1).

Table 11 - Hold Bit to Channel Correspondence

Channel

Bit

HE550MIX977 HE550DAC207

H9 OUTPUT CHANNEL 1 OUTPUT CHANNEL 1

H10 OUTPUT CHANNEL 2 OUTPUT CHANNEL 2

H11 OUTPUT CHANNEL 3 OUTPUT CHANNEL 3

H12 OUTPUT CHANNEL 4 OUTPUT CHANNEL 4

H13 Not used OUTPUT CHANNEL 5

H14 Not used OUTPUT CHANNEL 6

H15 Not used OUTPUT CHANNEL 7

H16 Not used OUTPUT CHANNEL 8

3.3 Consumed Directed Data Power-Up Initialization

At power-up, the SmartStix I/O Module’s eight Consumed Directed Data words are all cleared to 0. Until

Directed Data is actually received from a Control Station, the SmartStix I/O Module will exhibit the

following behavior:

1. All Analog Outputs are Off, until analog output data is received from a Control Station.

2. The device expects to receive analog output data at least every two seconds.

3. The device transmits a Heartbeat every second.

4. The device transmits its Analog Input data every 500 milliseconds.

5. If analog output data is received, and then not received for 2 seconds, the outputs go Off

again.

6. At power-up, a request for Directed Data is transmitted to the CsCAN Network.

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Horner-apg SmartStix Analog Programming Guide Instrukcja Użytkownika Strona 9