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44 SM8000 Series Programming
Open Trigger Select Register – Write Only
ADDR
Plug-In LA+0x36
D15-D8
Sets the TTLTRIG line or lines, which are configures as outputs,
and will toggle when Relay Open condition occurs in the module.
D15 corresponds to TTLTRIG7, D14 to TTLTRIG6, … and D8 to
TTLTRIG0. Setting a bit to a 1 enables the trigger line, setting a
bit to 0 disables the corresponding line. All bits are set to 0s when
either a soft or a hard reset is received by the module.
D7-D0
Sets the TTLTRIG line or lines, which are configured as inputs,
and will cause a Relay Open event to occur in the module. D7
corresponds to TTLTRIG7, D6 to TTLTRIG6, … and D0 to
TTLTRIG0. Setting a bit to a 1 enables the trigger line, setting a
bit to 0 disables the corresponding line. All enabled TTLTRIG
lines are OR’d together to allow more than one TTLTRIG line to
cause a Relay Open event to occur. All bits are set to 0s when the
module receives either a soft or a hard reset.
TTL Trigger Polarity Register – Write Only
ADDR
Plug-In LA+0x38
D15-D14 Unused Data written to these bits have no affect.
D13-D8 FAIL LED Control D13 is for module 5 … D8 is for module 0. 0 = off, 1 = on.
D4
Board Busy
Trigger Slope
0 acts on the falling edge, 1 acts on the rising edge.
D3
Relay Open Input
Slope
0 acts on the falling edge, 1 acts on the rising edge.
D2
Relay Open Output
Slope
0 sets the falling edge active, 1 sets the rising edge active.
D1
Trace Advance
Input Slope
0 advances on the falling edge, 1 advances on the rising edge.
D0
Trace Advance
Output Slope
0 sets the falling edge active, 1 sets the rising edge active.
Note: A hard or a soft reset sets D3-D0 to 0 s.