ADLINK PCI-8154 - Manual (Page 201)

Function Library 191
CntSrc : general counter source
CntValue , *CntValue: the counter value
TargetPos , *TargetPos: Target position recorder value,
range: -134217728 to 134217727
ResDistance , *ResDistance: residue distance
Value Meaning
0 Command pulse
1 EA/EB
2 Pulser input
3 System clock÷2