Problem with omitting nodes in a subcircuit herder using OrCAD PSpice

[peleus]

In pspice language syntax it is allowed to omit nodes in a subcircuit header according to the PSpice Reference.pdf. However, the simulator turns out an error that there is no subcircuit name during an X call. From my point of view the latter means that the simulator looks for at least one node and then for a subcircuit name. I have a serious interest on usage of such a subcircuit without any node.

Ex:

.subckt xx
v1 1 0 0V
r1 1 0 1k
.ends

x1 xx

Instantiating x1 causes an error but it should run. Is there any patch?

 

[jonatan]

Re: OrCAD PSpice bug?

Pspice requires a node number in order do instance a component, you cannot
insert a component without these informations.

.subckt a b xx
v1 a b 0V
r1 a b 1k
.ends

and if you want to use several subcircuits in parallel

x1 1 0 xx
X2 1 0 xx
X2 1 0 xx

or in series

X1 1 2 xx
X2 2 3 xx
X3 3 0 xx

 

[peleus]

Re: OrCAD PSpice bug?

It's not true what you have typed concerning number of nodes. The following is an extract from the PSpice Reference Guide.

[node]*
An optional list of nodes (pins). This is optional because it is possible to
specify a subcircuit that has no interface nodes.

Similarly, if you take a look at X command, you'll see that the number of nodes is optional including zero.

Thanx for your effort Jonatan.