Default settings of PZD structure
STW1: Control Word, mapping to MODBUS address 0x2000 of VFD series Drives.
HSW: Main set point, mapping to MODBUS address 0x2001 of VFD series Drives.
ZSW: Drives status, mapping to MODBUS address 0x2101 of VFD series Drives.
HIW: Main command frequency, mapping to MODBUS address 0x2102 of VFD series Drives.
DP master 
PZD3: No default assignment
PZD4: No default assignment
VFD series 
PZD3: Output frequency, mapping to MODBUS address 0x2103 of VFD series Drives.
PZD4: Output current, mapping to MODBUS address 0x2104 of VFD series Drives.
Control and Status words
Control word (data from DP to VFD series Drives)
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  | 00: No function  | 
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  | 01: Stop  | 
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  | 10: Run  | 
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  | 11: JOG+Run  | 
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  | Not used  | 
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  | 00: No function  | 
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  | 01: FWD  | 
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  | 10: REV  | 
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  | 11: Change direction  | 
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  | 00: 1st Accel / Decel time  | 
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  | 01: 2nd Accel / Decel time  | 
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  | 10: 3rd Accel / Decel time  | 
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  | 11: 4th Accel / Decel time  | 
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  | 0000: Main speed  | 
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  | 0001: 1st speed  | 
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  | 0010: 2nd speed  | 
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  | 0011: 3rd speed  | 
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  | 0100: 4th speed  | 
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