[LONG]
V-NBITEM=Number of items (words or bits)
V-STYP=~
V-RET=~
V-FID=File identifier
V-OK=TRUE if successful
V-NAME=Optional request name (description)
V-ADDRESS=MODBUS address
V-REQUEST=Request type: RIW / RHW / RIB / RCB
[SHORT]
V-NBITEM=~
V-STYP=~
V-RET=~
V-FID=~
V-OK=~
V-NAME=~
V-ADDRESS=~
V-REQUEST=~
