Baldor mn1854 manual Daisy Chain Connections, Rules for Daisy Chain Operation, PC / Host Device

Daisy Chain Connections

LinStep+ can support daisy chaining. The unit address (range 1–99) can be set with the keypad, through Application Developer, or with a terminal program using the Unit Number (UN) command, or the entire chain may be addressed at once using the Auto–Address (AA) command. Connect as shown in Figure 3-8.

Rules for Daisy Chain Operation

1.All LinStep’s in a daisy chain must have their device address assigned in ascending order away from the host device. This allows the Load All (LA

– EX) commands to work properly. Addresses do not have to be sequential, but must be in ascending order.

Example: 1, 2, 4, 6, 8 is valid addressing. 6, 3, 10, 8, 2 is not valid.

2.Do not duplicate unit addresses.

3.RS–232C “Echo” should be turned on for each unit in the daisy chain. Disabling RS–232C Echo will prevent daisy chain operation.

4.All RS–232C connections must be correctly made.

5.“Device Addressing” RS–232C commands (for a specific LinStep+ device) must have the correct address specified in the command.

6.Status commands require the correct address.

PC / Host Device

RXD

TXD

GND

Figure 3-8 Daisy Chain Connection

	LinStep+		LinStep+
	Unit 1		Unit 2
RXD TXD GND		RXD TXD GND

LinStep+

Unit 3

RXD TXD GND

3-8Receiving & Installation MN1854