User manual

IEC61131 User and Reference Manual
April 22, 2008
209
 Digital input channel 10 returns the VLOOP over-current status. This indicates VLOOP
over-current has been detected. This input clears when VLOOP output is off, or the
over-current condition clears.
0 = off
1 = on
 Digital input channel 11 returns the digital output mismatch status.
Known outputs are compared to the corresponding inputs to detect incorrect outputs. A
point is compared if it has been turned on at any time since controller reset. This input
indicates if one or more outputs mismatch. The source of the mismatch can be
determined by comparing each digital input against the corresponding digital output.
The SCADAPack 350 on board digital I/O can be inputs or outputs. There is no
configuration for the type, the SCADAPack 350 accepts digital inputs on a point and will
write a digital output if programmed.
For example if D I/O point 0 is assigned registers 10001 as an input it is also assigned
as digital output 00001. If the application turns on 00001 then 10001 will be seen as ON.
While this flexibility is useful it can cause problems in an application if users
inadvertently turn ON a DIO that is used as an input in an application.
The internal DI 11 is turned ON if the SCADAPack 350 detects that a point has been
turned on as an input and then turned on as a digital output in the application. Each time
the controller is reset it begins the internal test again.
0 = No mismatch
1 = One or more digital outputs mismatch
 Digital input channel 12 returns the Com3 (HMI) power control status.
0 = off
1 = on
Data for each of the thirteen I/O channels may be connected to user-defined variables with
the I/O connection editor. Connected variables are updated continuously with data from the
SCADAPack 350 I/O hardware.
The DOUT sub-module module provides eleven I/O channels for the digital outputs of the
SCADAPack 350 I/O hardware.
The SCADAPack 350 I/O hardware provides eight universal digital inputs or outputs.
Outputs are open-collector/open drain type.
 These are defined as digital output channels 0 to 7.
0 = output transistor off
1 = output transistor on
The SCADAPack 350 I/O hardware also provides three internal digital outputs.
 Digital output channel 8 is used to control the VLOOP power supply.
0 = VLOOP output off
1 = VLOOP output on
 Digital output channel 9 is used to control the DC/DC converter.
0 = off
1 = on