Sequencer blocks activate devices in a sequential order based on the rank of the device and whether the device is enabled. Lower ranked devices are activated before higher ranked devices, and higher ranked devices are deactivated before lower ranked devices.
The Input value at which the sequencer activates or deactivates each device is based on the make and break limits configured for the Sequencer. See Editing SEQ (Sequencer) Blocks for information on configuring the make and break limits. The defaults for a 3-stage Sequencer with a range of 0–100 are the following:
|
Make Limits (Activation Points) |
Break Limits (Deactivation Points) |
|
|---|---|---|
|
Stage 1 |
33 |
1 |
|
Stage 2 |
67 |
34 |
|
Stage 3 |
99 |
68 |
Sequencer blocks can output a value for minimum of 2 and maximum of 8 devices. The following table describes the components of a Sequencer block:
|
Component |
Description |
|---|---|
|
Input |
Determines the number of activated stages. |
|
Instant Shutdown |
Determines if the Sequencer is enabled or disabled. Use a binary object attribute (1.0=Enabled, 0.0=Disabled). |
|
Rotate Now |
Activates reordering of output sequence. The manner in which the outputs Device 1 Output through Device 8 Output are reordered for activation is based on a combination of two factors: the ranking defined for each device, and whether the device is enabled. All enabled outputs are scheduled for output selection prior to disabled outputs. And, within each of these categories (enabled and disabled outputs), the selections are ordered beginning with the lowest ranked and proceeding on through to the highest ranked output. Unlike all other reordering scenarios, the issue of whether or not a device is currently active is not taken into account in this situation. Use a binary object attribute (1.0=Rotate now, 0.0=Do not rotate now). |
|
Device 1–8 Enable |
Establishes whether or not the output is enabled. Use a binary object attribute (1.0=Enabled, 0.0=Disabled). |
|
Device 1–8 Rank |
Establishes the order in which device outputs are activated. Use an analog object attribute (reference block) or a Constant block. |
|
Binary Attribute Value |
Command/State |
True or False |
|---|---|---|
|
1.0 |
Active |
True |
|
0.0 |
Inactive |
False |
See Editing SEQ (Sequencer) Blocks for information on editing Sequencer blocks.