Each of the enabled polls in the set are executed sequentially. There is a configurable start time and delay between polls. The digital tags 'poll status #n' indicate the status of each poll. A global digital tag 'poll status' indicates the status of all the polls.
This form is used to create, update, and view polls. To create a poll select Insert from the drop down list. To view a poll double click it in the list of polls.
| Enable | Enable the poll. |
| Start Time | Time of day the poll should start. Hour, minute, second. Only used if check box is selected. |
| Poll Interval | Amount of time between instances of this poll. Hour, minute, second. Only used if check box is selected. |
| Poll Type | Specifies the source and destination type of the poll. |
| Builtin to Tag | A builtin value is used as the source and the list of output tags is the destination. |
| Onboard I/O to Tag | An onboard i/o port is used as the source and the list of output tags is the destination. |
| Tag to Onboard I/O | A tag is used as the source and an onboard i/o port is used as the destination. |
| External to Tag | A modbus device is used as the source and the list of tags is the destination. |
| Tag to External | A list of tags is used as the source and a modbus devices is used as the destination. |
| Tag to Tag | A list of tags is used as the source and another list of tags as the destination. |
| External to External | A modbus devices is used as the source and the same or another modbus device used as the destination. |
The polls types have a source and destination. The Builtin form is used for source only. The Onboard I/O, Tag, and External forms can be used for both source and destination.
Used to move tags from the Available list to the Selected list and back again.
All of the tags are of the same type: Analog or Digital. This is selected from the radio buttons below the Available list. Default is Analog.
Initially all tags on the Tags form are listed. You can move these to the Selected list using the > and » buttons. You can move selected tags by choosing them with the windows paradigm then clicking the > button. You can move all of the tags by clicking the » button.
Tags that you have previously selected are in the Selected list. You can move these to the Available list using the < and « buttons. You can move selected tags by choosing them with the windows paradigm the clicking the < button. You can move all of the tags by clicking the « button.
Each row defines one modbus master request. These are defined in the order they are sent to the RTU. The modbus requests are used to transfer registers between the master and slave. The terminal is the master and the RTU is the slave.
| Reg Type | Type of register: coils, status, inputs, holdings. |
| Reg Address | Slave register address. |
| Num Regs | Number of registers to transfer. For a 32 bit register this is set to 1 to transfer one register. |
| Reg Len | Number of bits in a register value. 1, 16, 32. |
| Function | Function code of the modbus request. |
| RTU ID | Slave identifier of the modbus request. 1 to 247. |
| Com Port | Com port to access attached RTUs. Also see Com Ports form. |
| Timeout | No response timeout in 1/10 seconds. |
| Tries | Number of attempts before giving up. |
Used to select an onboard i/o port number. That port must have been configured on the Onboard I/O form.
Used to select one of many internal values.