From GridLAB-D Wiki
maximum_synctime - Control the maximum time any sync operation is allowed to take before a global alarm is raised
Synopsis
host% gridlabd -D maximum_synctime=60 host% gridlabd -define maximum_synctime=60 #set maximum_synctime=60
Description
The maximum synctime global variable is used to control how long GridLAB-D waits for a single sync operation before raising a global alarm that halts the simulation. Under certain circumstances applications may use sync operations to acquire information and wait for data sources that take longer the 60 seconds to respond. In such cases, it may be desirable to increase the maximum_synctime to allow for long sync response delays.