Horner APG SmartStix Analog Programming Guide - Manual (Page 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.