Parameters Parameters The external encoder device type is 0. This means that the type parameter in all DEVICE or SETDEVICE instructions that reference the external encoders must have a value of zero. The standard controller allows two external encoder units. These units are numbered 0 and 1. All DEVICE functions and SETDEVICE instructions that reference the external encoders must specify one of these unit numbers for the unit parameter. eV+Language User's Guide, v2.x, 18318-000 Rev A Page 218