Specifications
Analog Output Modules
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The analog output period is set at the module level—you cannot configure different
channels to refresh at different intervals.
This parameter is represented as an unsigned 8-bit number. To access this
parameter using RTP, write the following values to the RTP request block:
Fallback Modes When communications are lost between the output module and the fieldbus master,
the module’s output channels must go to a known state where they will remain until
communications are restored. This is known as the channel’s fallback state. You
may configure fallback states for each channel individually. Fallback configuration is
accomplished in two steps:
z first by configuring fallback modes for each channel
z then (if necessary) configuring the fallback states
All output channels have a fallback mode—either predefined state or hold last value.
When a channel has predefined state as its fallback mode, it can be configured with
a fallback state, which may be any value in the valid range. When a channel has hold
last value as its fallback mode, it stays at its last known state when communication
is lost— it cannot be configured with a predefined fallback state.
By default, the fallback mode for both channels is a predefined state. If you want to
change the fallback mode to hold last value, you need to use the Advantys
configuration software:
Length 1
Index (low byte) 0x10
Index (high byte) 0x23
Sub-index 0
Data Byte 1 5 to 255
Step Action Result
1 Double click on the STB ACO 1210 module
you want to configure in the island editor.
The selected STB ACO 1210 module
opens in the software module editor.
2 Expand the + Fallback Mode row by clicking
on the + sign.
Rows for Channel 1 and Channel 2
appear.
3 From the pull-down menu in the Value
column of the Channel 1 and/or Channel 1
row, select the desired fallback mode setting.
Two choices appear in the pull-down
menus—Predefined and Hod Last
Value.
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