Rockwell Automation 61C544A RTD Module - Manual (Page 23)

4Ć7
4.1.7 Channel Configuration Status Register (Register 21)
Register 21 indicates whether or not a channel has been configured.
See figure 4.7. A bit is set in this register when a channel receives a
correct write configuration command. The bit remains set until it is
cleared by a reset configuration command from register 31.
Bit 0ă=ăChannel 0 Bit 5ă=ăChannel 5 Bit 10ă=ăChannel 10
Bit 1ă=ăChannel 1 Bit 6ă=ăChannel 6 Bit 11ă=ăChannel 11
Bit 2ă=ăChannel 2 Bit 7ă=ăChannel 7 Bit 12ă=ăChannel 12
Bit 3ă=ăChannel 3 Bit 8ă=ăChannel 8 Bit 13ă=ăChannel 13
Bit 4ă=ăChannel 4 Bit 9ă=ăChannel 9 Bit 14ă=ăChannel 14
Bit 15ă=ăChannel 15
Register 21
Bits 0Ć15
R R R R R R R R R R R R R R R R
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 4.7 Ć Channel Configuration Status Register
4.1.8 Configuration Status Register (Register 22)
Register 22 provides the status of the configuration command issued
by register 31. See figure 4.8. Bit 15 is set in this register whenever a
channel receives a configuration command. Error bit 14 will be set if
an incorrect configuration command is detected.
Bit 0 = Channel Number Error
Bit 1 = Illegal Running Average Error
Bit 2 = Low Low Alarm Value Is Not The Lowest
Bit 3 = High Alarm Value Is Not Larger Than The Low Alarm Value
Bit 4 = High High Alarm Value Is Not The Highest
Bit 5 = Alarm Value Is Out Of Range Of the Hardware Limits
Bit 6 = Illegal Configuration Command
Bit 7 = READY State Must Be Enabled
Bits 8 to 13 = Not Used
Bit 14 = Configuration Error
Bit 15 = Configuration Is Complete
Register 22
Bits 0Ć15
R R - - - - - - R R R R R R R R
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 4.8 Ć Configuration Status Register
Bit 15 will remain set after a configuration command is received until
bits 12 to 15 of the Configuration Command Register (register 31) are
reset to zero. When bits 12 to 15 of register 31 are reset to zero, the
RTD module resets bit 15 of register 22, which allows you to enter