ViewPoint Manual

Supplemental Information for D-Series Systems
ViewPoint Manual—426801-001
E-2
Communication Between Low-PIN and
High-PIN Processes
Communication Between Low-PIN and High-PIN Processes
A high-PIN process on a D-series system cannot communicate with a process on a
C-series system without a low-PIN, D-series process, as an intermediate process.
However, low-PIN processes on a D-series system can communicate directly with
processes on a C-series system. On a D-series system, processes can communicate with
each other, whether they are low-PIN or high-PIN processes. Figure E-1 illustrates
these concepts.
Note that in order for a process to run at high PIN, it must have certain characteristics.
For example, you might not be able to take a C-series program and run it on a D-series
system at high PIN. The program might need to be converted first. In addition, high-
PIN processes and low-PIN processes must meet certain requirements to communicate
with each other. See the Guardian Application Conversion Guide and the Introduction
to D-Series Systems for more information.
Process Descriptor
A process descriptor is a variable-length string that specifies either a named or unnamed
process (or a named process pair). In an EMS filter, to extract a process name or system
name from an EMS token, use the DECOMPOSE function. The DECOMPOSE
function can obtain this information from the process descriptor.
For more information on the process descriptor, see the Guardian Application
Conversion Guide. For information on the DECOMPOSE function, see the
EMS Manual section describing D-series changes.
Figure E-1. Communication Between low-PIN and high-PIN Processes
CDT0E1.cdd