[LONG]
V-NBITEM=Number of items (words or bits)
V-FID=File identifier
V-M_ONCALL=~
V-OK=TRUE if successful
V-NAME=Optional request name (description)
V-M_ONCHANGE=~
V-TRIALS=~
V-SLAVENO=~
V-ADDRESS=MODBUS address
V-F_WRITE=~
V-A_HOLDING=~
V-PERIOD=~
V-REQUEST=Request type: RIW / RHW / RIB / RCB
V-A_WORDS=~
V-TIMEOUT=~
V-M_PERIODIC=~
[SHORT]
V-M_ONCALL=~
V-M_ONCHANGE=~
V-TRIALS=~
V-SLAVENO=~
V-F_WRITE=~
V-A_HOLDING=~
V-PERIOD=~
V-REQUEST=
V-A_WORDS=~
V-TIMEOUT=~
V-M_PERIODIC=~
