Issue 01/06 | Parameter Description |
P2019[8] CI: PZD to COM link (USS) |
| Min: | 0:0 | ||
CStat: | CT | Datatype: U32 | Unit: - | Def: | 52:0 |
COMM | Active: Immediately | QuickComm.: No | Max: | 4000:0 |
Selects signals (process data PZD) to be transmitted to serial interface via USS on COM link
Level
3
r0052 | P2019 |
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r0052 | [0] |
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r0021 | [1] |
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r0053 | [3] |
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r0053 | . |
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| . | PZD4 | PZD3 | PZD2 | PZD1 |
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| [7] | ZSW2 |
| HIW | ZSW1 |
STX | Start of text |
LGE | Length |
ADR | Address |
PKW | Parameter ID value |
PZD | Process data |
BCC | Block check character |
ZSW | Status word |
HIW | Main actual value |
P2012
BCC |
| PZD | PKW |
| ADR |
| LGE |
| Process data | Parameter |
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USS telegram
STX
PZD mapping from parameter P2019 USS on COM link
Index:
P2019[0] : Transmitted word 0
P2019[1] : Transmitted word 1
P2019[2] : Transmitted word 2
P2019[3] : Transmitted word 3
P2019[4] : Transmitted word 4
P2019[5] : Transmitted word 5
P2019[6] : Transmitted word 6
P2019[7] : Transmitted word 7
Details:
See P2016 (PZD to BOP link)
r2024[2] | USS |
| Min: | - | Level |
| Datatype: U16 | Unit: - | Def: | - | 3 |
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| Max: | - |
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Displays number of
Index:
r2024[0] : Serial interface COM link
r2024[1] : Serial interface BOP link
r2025[2] USS rejected telegrams |
| Min: | - | Level | |
| Datatype: U16 | Unit: - | Def: | - | 3 |
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| Max: | - |
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Displays the number of rejected USS telegrams. The sum of all USS errors (r2026 - r2031) is displayed in parameter r2025.
The following monitoring mechanisms have been implemented
-when a telegram is received, then initially, the correct start of a telegram (start interval + STX) must be identified and then the length must be evaluated (LGE). If the length does not correspond to the selected value for a fixed telegram or it does not have a valid value for a variable telegram length, the telegram is rejected.
-the appropriate times are monitored before and while receiving telegrams.
-the block check character (BCC) is generated while the telegram is received and after the complete telegram has been
-if a character frame error or a parity error has not occurred in any of the received characters, then the node number (ADR) of the received telegram can be evaluated.
-the telegram is rejected if the address byte (ADR) does not correspond to the node number (for slave) or the expected slave node number (for the master).
Index:
r2025[0] : Serial interface COM link
r2025[1] : Serial interface BOP link
MICROMASTER 440 | Parameter List |
201 |