Acknowledgments

The modbus package is based on the modtcp and plctcp packages written by Rolf Keitel from Triumf. The modtcp package was originally converted to Linux by Ivan So from NSLS. modbus was extensively re-written for conversion to EPICS 3.14 and to use the EPICS asyn module. It now contains little of the original modtcp code, but retains much of the original architecture.